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Write the second sentence so that it has a similar meaning to the first sentence.
1. Tim has to look after his baby sister when his parents are out.
=> Tim has to take care of his baby sister when his parents are out.
2. Hoa's aunt hates durians and so does She.
=> Hoa doesn't like durians and neither does she.
3. How high is that building ?
=> What is the height of that building?
4. He prefers playing baseball to watching television.
=> He likes playing baseball more than watching television.
5. I like watching a film better than reading comics.
=> I prefer watching a film to reading comics
6. My sister was a skillful dancer.
=> My little sister danced skillfully
7. Mr. Lam drives a taxi carefully.
=> Mr. Lam is a careful taxi driver
8. The history of these places interests me.
=> I am interested in the history of these places
9. I like reading books more than watching TV.
=> I prefer reading books to watching TV.
10. Hoa runs very fast.
=> How does Hoa run?
11. How tall is Lan ?
=> What is Lan’s height?
12. Tuan plays soccer skilllfully.
=> Tuan is a skillful soccer player
13. He is a skillful volleyball player.
=> He plays volleyball skillfully
14. How heavy is his father ?
=> What is his father’s weight?
15. You should go to the dentist when you have a toothache.
=> You ought to go to the dentist when you have a toothache.
16. My mother likes walking better than cycling.
=> My mother prefers walking to cycling.
17. How heavy is She ?
=> What is her weight?
18. Staying up late is bad for our health.
=> Staying up late isn’t good for our health
19. You should wash your hands before meals.
=> You ought to wash your hands before meals.
20. My brother likes swimming better than jogging.
=> My brother prefers swimming to jogging
21. We play the Piano very well.
=> We are good pianists
22. Remember to brush your teeth after meal.
=> Don't forget to brush your teeth after meal
23. My sister can play badminton very skillfully.
=> My sister is a skillful badminton player
24. I like to stay at home tonight more than go to the cinema.
=> I prefer staying at home tonight to going to the cinema
25. How long is your dress ?
=> What is the length of your dress?
26. Peter studies well.
=> Peter is a good student
27. He plays football well.
=> He is a good footballer
28. What about playing chess?
=> Why don’t we play chess?
29. What's your daughter's age ?
=> How old is your daughter?
30. Nam didn't go to the school yesterday.
=> Nam was absent from the school yesterday.
Ex1.Rewrite the following sentences.
1.My house is smaller than her house.
->Her house...is bigger than my house..........
2.How much are these shoes.
->How much do...these shoes cost............
3.She likes noodles best.
->Her favorite...food is noodles...............
4.How much does a can of coca cost.
->How....much is a can of coca.............
5.How much is an apple?
->How..much is the price of an apple........
6.My sister walks to the supermarket.
->My sister goes.....to the supermarket on foot.........
7.What about taking some photos?
->Why....don't we take some photos..........
8. How much is this pen?
->How much...does this pen cost...............
9.She walks to work.
->She....goes to work on foot........
10.There are 14 classrooms in our school?
->Our....school has 14 classrooms ..................
Ex2.Đặt câu hỏi cho từ dc bôi đen.
1.We want two bottles of water.
=>What do you want ?
2.Miss Trang feels very tired.
=>How does miss trang feel
3.An ice cream is five dollar.
=>How much is an ice cream
4.Yes. She often goes shopping on the weekend
=>Does she often go shopping on the weekend.
5.Ly goes to school six days a week.
=>How often does ly go to school
6.They are going to stay there for 2 days.
=>How long are they going to stay there
7.Linh has milk and eggs for breakfast.
=>What does Linh have for breakfast
8.The weather is cool and wet in London.
=>What is the weather like in london
9.My favorite food is fish.
=>What is your favorite food
10.Yes. I often play badminton in the fall.
=>Do you often play badminton in the fall
11. We often play badminton in the afternoon.
=>When do you often play badminton?
12. My father has lunch at home.
=>Where does your father have lunch ?
ex3:Comeplete each sentence so it means the same as the sentence above
1.I don't have a bookshelf in my room.->There isn't a bookshelf in my room
2.The note book is on the book->The book is under the notebook
3.The car is in front of the bus.->The bus is behind the car
4.My favorite room in the house is the bedroom->I like my bedroom best
5.Quang is lazier than Ha.->Ha is harder than Quang
6.A city is noisier than a village.->A village is quieter than a city
7.Please tell me something about yourneighborhood.->I like you to tell me something about your neighborhood
8.In summer,Da Nang is hot but Vinh hotter.->In summer,Vinh is hotter than Da Nang
9.It is wrong of us to throw rubbish->We mustn't throw rubbish
10.Ha Noi is large,Bangkok is larger and Tokyo is the largest->Tokyo is the largest of the three cities
11.It is not good to stay up so late to listen to music.->You shouldn't stay up so late to listen to music
12.How many times a week do you do go to your painting club->How often do you go to your painting club?
13.It is essential that you do your homework before going to scholl->You must do your homework before going to school
14.Nobody is older than my grandfather in my family->My grandfather is the oldest in my family
15.Kiet is the best at English in his class->Nobody in Kiet's class is better at English than him
16.We have four chairs and a table in my room->There are four chairs and a table in my room
17.The notebook is on the right of the book->The book is on the left of the notebook
18.I like the living room in my house->My favorite room in my house is the living room
Viet lai cau sao cho giu nguyen nghia :
1, It took Mr.Hoang half an hour to walk to work yesterday.
-> Mr.Hoang spent half an hour walking to work yesterday
2, What is the price of this cap ?
-> How much is this cap?
3, You shouldn't eat too much meat .
->You'd better not eat too much meat
4, Lan is the youngest of the three sister.
-> Lan has two elder sisters
5, Our house is older than any other house in the living centre.
-> Our house is the oldest in the living centre
6,Mai usually studies hard.
-> Mai is usually a hard student
7, There are eight hundred stamps in Hoa's collection.
->Hoa's collection has eight hundred stamps
8, How heavy is the chicken ?
-> What is the chicken's weight?
9, How much is this book ?
-> What is the price of this book?
10, Listening to music is more interesting than watching TV.
-> I prefer listening to music to watching TV
I. Complete the second sentence so that it means the same as the sentence before it .
1. It is not good if you exercise too hard for too long
-> You should not exercise too hard for too long
2. My father runs five kilometers every day , so he is strong and fit .
-> My father is strong and fit because he runs five kilometers every day
3. I'm not interested in table tennis as my brother .
-> My brother is not interested in table tennis and I'm not, either
4. Simon is very good at basketball
-> Simon can play basketball well
5. My brother plays football very well .
-> My brother is a good football player
6. David likes playing badminton it .
-> Badminton is David's favourite sport
7. Sports and games are very important in children's lives .
-> Sports and games play an important role in children's lives
8. Children take part in many after-school activities when school finishes .
-> Children do many after-school activities when school finishes
9. It started raining an hour ago .
-> It has rained for an hour
10. No one in my class is more hard - working than Frank .
-> Frank is the most hard - working person in my class
11. The last time we saw her was on Christmas Day .
-> We haven't seen her since Christmas Day
12. I haven't eaten this kind of food before .
-> This is the first time I've eaten this kind of food
13. She bought that house in 1973
-> She has bought that house since 1973
14. I don't have a robot in my house .
-> There isn't a robot in my house
15. I won't be able to do everything my self unless I have a mordern robot .
-> If I don't have a modern robot, I won't be able to do everything myself
16 . Minh likes teaching robots very much .
-> Minh is very interested in teaching robots
17. The robot in my house can clean the floor very well .
-> The robot in my house is very good at cleaning the floor
18. Barbara plays chess better than Mike .
-> Mike doesn't play chess as well as Barbara
19. There are too few glasses for everyone to have a drink .
-> We haven't got enough glasses for everyone to have a drink
20. It is my sister's eighteeth birthday next week .
-> My sister will be eighteenth next week
II. Use the correct form of the words in brackets .
1. The programme attracted millions of viewers ( view )
2. That detective film was very boring ( bore )
3. Many teenagers are interested in pop music ( interest )
4. He was sitting comfortably in the living room , watching TV ( comfort )
5.The boy band will give two performances this week ( perform )
6. On the game show family Feud , contestants are family members ( contest )
7. Cable TV offers a wide variety of special programs ( vary )
III. Choose the best answer to complete the sentences .
1. If we cut down more trees , there .............. more floods .
A. are B. were C. have been D. will be
2. That is .......... book I've ever read .
A. the interestest B. in the interesting C. the most interesting D. the most interested .
3. I've never seen a ....... bridge than this one .
A. longest B. longer C. most longest D. more longer I
4. That dog isn't ............ it looks .
A. more dangerous B. as dangerous as C. dangerous than D. dangerouser than
IV . Write full sentences using the given words .
1. What / expensive car
-> What an expensive car !
2. In the year 2030 , / robots / be able to do all / housework / instead of / us
-> In the year 2030, robots will be able to do all the housework instead of us
I. Complete the second sentence so that it means the same as the sentence before it .
1. It is not good if you exercise too hard for too long
-> You should not exercise too hard for too long
2. My father runs five kilometers every day , so he is strong and fit .
-> My father is strong and fit because he runs five kilometers every day ,
3. I'm not interested in table tennis as my brother .
-> My brother isn't interested in table tennis as me
4. Simon is very good at basketball
-> Simon can play basketball very well
5. My brother plays football very well .
-> My brother is very good at football
6. David likes playing badminton it .
-> Badminton is David's favorite sport
7. Sports and games are very important in children's lives .
-> Sports and games play an important role in children's lives
8. Children take part in many after-school activities when school finishes .
-> Children do many after-school activities when school finishes .
9. It started raining an hour ago .
-> It has rained for an hour
10. No one in my class is more hard - working than Frank .
-> Frank is the most hard - working in my class
11. The last time we saw her was on Christmas Day .
-> We haven't seen her since Christmas Day
12. I haven't eaten this kind of food before .
-> This is is the first time I have eaten this kind of food
13. She bought that house in 1973
-> She has that house since 1973
14. I don't have a robot in my house .
-> There isn't a robot in my house
15. I won't be able to do everything my self unless I have a mordern robot .
-> If I don', have a mordern robot I won't be able to do everything my self
16 . Minh likes teaching robots very much .
-> Minh is very interested in teaching robots
17. The robot in my house can clean the floor very well .
-> The robot in my house is very good at cleaning the floor
18. Barbara plays chess better than Mike .
-> Mike doesn't play chess better than Barbara
19. There are too few glasses for everyone to have a drink .
-> We haven't got enough glasses for everyone to have a drink .
20. It is my sister's eighteeth birthday next week .
-> My sister will be eighteen next week .
Viết lại câu sau sao cho nghĩa ko thay đổi:
He has had his breakfast since 7 o’clock.-> he began to eat at 7 o'clock
Mr. Ba has talked to our teacher for an hour.-> Mr. Ba started to talk to our teacher an hour ago
1. Let’s go for a drink. What about going for a drink?
Why don't we go for a drink?
Shall we go for a drink?
Would you like to go for a drink?
2. How about playing soccer after school today?
Would you like to play soccer after school today?
Let us play soccer after school today
Why don't we play soccer after school today?
*) How much + be + S?
= How much + do/ does/ did + S + cost?
= What + be + the price of + S?
1. How much does her dress cost? How much is her dress?
What is the price of her dress?
2. How much was your hat?
How much did your hat cost?
What is the price of your hat?
4. What was the price of these shoes?
How much were these shoes?
How much did these shoes cost?
5. What is the price of this ruler?
How much does this ruler cost?
How much is this ruler?
6. How much did the blue shirt cost?
How much was the blue shirt?
What was the price of the blue shirt?
*) S + be + (a/an) + adj + N (job)
= S + V + Adv
Ex: My father is a skillful player My father plays skillfully.
1. Tom drives carefully. Tom is a careful driver
2. My mother cooks very well. My mother is a good cook
3. Lan studies hard. Lan is a hard student
4. They are safe cyclists. They cycle safely
5. Mrs.Pike speaks French fluently. Mrs.Pike is a fluent French speaker
Exercise: Rewrite these sentences
1. My mother and I walk to the supermarket every day.
My mother and I go to the supermarket on foot every day.
2. How much is this hat?
How much does this hat cost?
3. Why don’t we sing an English song?
What about singing an English song?
4. No house in the village is older than this house.
This house is the oldest house in the village
5. Does your school have twenty classrooms and six hundred students?
Are there twenty classrooms and six hundred students in your school?
6. My house has a living- room , two bedrooms and a kitchen .
There is a living- room , two bedrooms and a kitchen . in my house
7. What’s your father’s weight?
How heavy is your father?
8. This pencil belongs to my sister.
This is my sister's pencil
9. What time does she go to work?
When does she go to work??
10. How high is this building?
What is the height of this building?
11. How about going to Huong Pagoda by minibus?
Why don't we go to Huong Pagoda by minibus?
12. My house is not far from the post office.
My house is near the post office.
13. I often cycle to school.
I often go to school by bicycle
14. What would Lan like for her birthday?
What does Lan want for her birthday?
15. Jane is shorter than Mary.
Mary is taller than Jane
17. What is the price of this bike? How much is this bike?
18. The drugstore is to the right of the bakery. The bakery is to the left of the drugstore
19. What is she? What does she do?
20. Her hair is long. It is black and straight.
She has straight long black hair
21. Is there a colorful picture in your room?
Has your room got a colorful picture?
22. How much is a bowl of noodles?
How much does a bowl of noodles cost?
23. Let's go out for a walk.
Why don't we go out for a walk?
24. I like beef and vegetables best.
Beef and vegetables are my favorite food
25. That pencil belongs to Hoa.
Hoa is the owner of that pencil
26. What is the age of this building?.
How old is this building?
27. The Mekong river is longer than the Red river.
The red river is shorter than the Mekong river
28. I spend two hours a day doing my homework.
It takes me two hours a day to do my homework.
29. No one in my class is as beautiful as Hoa.
Hoa is the most beautiful in my class
30. It's often hot in the summer.
It's never cold in the summer
31. How much is this dictionary?
How much does this dictionary cost?
32. There are over eight hundred stamps in Tim’s collection.
Tim’s collection has over eight hundred stamps
33. How old is your father?
What is your father's age?
34. What is your son’s weight
How heavy is your son?
35. Mr Pike couldn’t enjoy the meal because of stomachache.
The stomachache prevented Mr. Pike from enjoying the meal
36. You shouldn’t eat too much meat.
You’d better not eat too much meat
37. He is a careful driver.
He drives carefully
38. Listening to music at home is more interesting than going to the concert.
I prefer Listening to music at home to going to the concert.
39. It is a six-hour drive from London to Edinburg.
It takes 6 hours to drive from London to Edinburg.
40. My brother drinks more coffee than my sister does.
My sister drinks less coffee than my brother does
41. I get to work in half an hour by bike.
It takes me half an hour to get to work by bike.
42. How much were these books ?
What were the prices of these books?
43. Did your classmates enjoy listening to music?
Were your classmate interested in listening to music?
44. They had a two-week summer vacation
Their summer vacation lasts for 2 weeks
45. She’ll probably take an English course for six weeks.
She will probably take a six-week Englsuh course
46. It isn’t important for you to finish the work
You don’t have to finish the work
47. She works more hours than him (many)
he doesn't work as many hours as she does
49. Mr Jack produces the most rice of all farmers.
No farmer produces more rice than Mr Kack does
50. How long did it take her to travel to her hometown?
How many hours does it take her to travel to her hometown?
51. It is impossible for the boys to play soccer here
The boys can’t play soccer here).
52. This box has twelve packets of tea.
There are twelve packets of tea. in this box
53. How many apples do you want ?
How many apples would you like to buy ?
54. No house on the street is older than this house.
This house is the oldest house on the street
55. Hang is the tallest girl in my class .
No girl in my class is taller than Hang
56. Phuong has a brother . His name is Trung .
Trung is Phuong's brother
67. What is the length of the Great Wall of China?
How long is the Great Wall of China?
68. He often walks to school.
He often goes to school. of foot
69. She has an oval face .
Her face is oval
70. My mother’s hair is long.
my mother has long hair
71. My school is Le Loi School .
I go to Le Loi school
72. Lan ‘s eyes are brown.
Lan has brown eyes
73. My house is smaller than your house.
Your house is bigger than mine
74. My class has thirty students .
There are thirty students in my class
75. My house is on the left of the bookstore .
The bookstore is on the right of my house
76. There are twenty classrooms in Hoa’s school .
Hoa ‘s school has twenty classrooms .
77. I am now sitting in front of Chi in the movie theater .
Chi is now sitting behind me in the movie theater .
78. Your hair is longer than my hair .
My hair is shorter than yours.
79. That box is small .
That is a small box
80. The Mekong River is longer than the Red River .
The Red River is shorter than the mekong river
81. The girl is beautiful .
She is a beautiful girl
82. She likes orange juice best .
Her favorite drink is orange juice
83. I am Hoa .
My name is hoa
84. Your bicycle is newer than my bicycle .
My bicycle is older than yours
85. What about taking some photos ?
Why don't we take some photos?
86. I want some chocolate .
I’d like some chocolate .
87. The menu doesn’t have fish and eggs.
There is no fish and eggs in the menu.
88. There are some boxes of chocolate in the store today
The store has some boxes of chocolate today.
89. What about taking some photos ?
Why don't we take some photos?
90. She likes cold weather .
What kind of weather does she like ?
91. The menu doesn’t have fish and rice.
There is no fish and rice in the menu.
92. My school has seven hundred students .
There .are seven hundred students in my school
93. Trung is Mr Binh ‘s son .
Mr Binh is Trung's father
94. Are there four windows in her room ?
Does her room have four windows
95. Mr Kien has a daughter . Her name is Lan .
Mr Kien is Lan's father
96. Does your class have twenty-five students ?
Are therr twenty-five students in your class ?
97. He goes to work at seven fifteen.
At a quarter past seven, he goes to work .
98. Mr Minh usually drives to work .
Mr Minh usually goes to work by car
99. How much is a bowl of noodles ?
How much does a bowl of noodles cost?
100. What is the price of a cake and an orange ?
How much are a cake and an orange ?
101. How much does a box of chocolates cost ?
What is the price of a box of chocolates?
21, Lan didn’t go to school yesterday because her sickness.-> Because Lan was sick, she did not go to school yesterday
22,You shouldn’t eat too much meat.-> You’d better not eat too much meat
23,How heavy is the chicken? -> What is the weight of the chicken?
24, What is your daughter’s age ?-> How old is your daughter?
25, He is a careful driver.-> He drives carefully
26, Long is a bad swimmer.-> Long swims badly
27,My brother cycles slowly.-> My brother is a slow cycler
28, Mr Cuong plays table tennis well.-> Mr Cuong is a good table tennis player
29, Mrs Chi is a quick typist.-> Mrs Chi types quickly
30,Thoa sings smoothly.-> Thoa is a smooth singer
31,Miss Lan is a fast runner.-> Miss Lan runs fastly
32,Mr Hung is a safe driver.-> Mr Hung drives safely
33, Minh’s sister dances marvellously.-> Minh’s sister is a marvellous dancer
34, Mrs Oanh cooks well.-> Mrs Oanh is a good cooker
35, Khanh is a fluent English speaker.-> Khanh speaks English fluently
36,My school has thirty classrooms.-> There are thirty classroom in my school
37, Literature interests my brother a lot.-> My brother is interested in literature
38, Nam likes staying at home than going to the zoo.-> Nam prefer staying at home to going to the zoo
39, Let’s visit the beautiful Khmer temples of Angkor Wat this summer-> How about visiting the beautiful Khmer temples of Angkor Wat this summer ?
40, Listening to music at home is more interesting than going to the concert.-> I prefer listening to music at home to going to the concert
41,We didn’t enjoy the trip because of the heavy rain.-> The heavy rain prevented us from enjoying the trip
42, You shouldn’t drink too much coffee.-> You’d better not drink too much coffee
43,He is a slower and more careful driver than I am.-> He drives more slowly and carefully than I am
44,The visitor spoke so quickly that I couldn’t understand what he said.-> The visitor spoke too quick for me to understand
45,How excellent the girl is !-> What a excellent girl!
46, It is one- fifty.-> It is ten to two
47,What is your address?-> Where do you live?
48, Finding an apartment in a big city is not easy.-> It is not easy to find an apartment in a big city
49, This library contains over 30 million books.-> there are over 30 million books in this library
50,The boy spends 3 hours a day learning the lesson.-> It takes the boy 3 hours a day to learn the lesson
51,How terrible the weather is !-> What terrible weather!
52,We enjoy playing football.-> We are interested in playing football
53, What is your mother’s job?-> What does your mother do?
54,Do you enjoy listening to music?-> Are you interested in listening to music?
55, He looks after the sick people.-> He takes care of the sick people
56,Lan is more intelligent than her sister.-> Lan’s sister isn’t as intelligent as her sister
57,A year has twelve months.-> There are twelve months in a year
58,We have a two –month summer vacation.-> Our summer vacation lasts 2 months
59,Will you please look after the house while we are away.-> Will you please take care of the house while we are away?
60, Viet Namese students have fewer vacations than American ones.-> American students have more vacations than Vietnamese students
61,It takes me about two hours each day to do my home work.-> I spend two hours each day doing my homework
62,Hoa is a hard student.-> Hoa study hard
63,An drives dangerously .-> An is a dangerous driver
Còn lại bạn tự làm nhé! Mệt lắm ạ!
Rewrite these srntences
1 There is a big libary in Lan's school=> Lan's school has a big library.
2 Lan learns Math very well => Lan is very good at Math.
3 Which subject do you like best?=> What is your favorite subject?
4 Why don't we go swimming=> What about going swimming?
5 The birhday cake is very swimming ?=> What a delicious birthday cake!
6 when is her birthday?=> what is her date of birth?
7 Nam/works more hours than Lan => Lan works fewer hours than Nam.
8 Nile river is linger than any rivers in the world => Nile river is the longest river in the world.
9 the school libary has over five thousands books
=> There are over five thousand books in the school library.
10 HA noihas many interesting places=> There are many interesting places in Ha Noi.
11 I have fewer toys than my younger sister=> My younger sister has more toys than me.
12 Lam has ten days off for this summer vacation => Lam has a ten-day summer vacation.
13 I often walk from home to school in ten minutes
=> It takes me ten minutes to walk from home to school.
14 It takes me about two hours each day to do my homework
=> I spend about two hours each day doing my homework.
15 Do you enjoy listening to music?
=> Are you interested in listening to music?
16 Mai drinks more milk than her brother=> Mai's brother drinks less milk than her.
17 The blue dress is chesper than the red one
=> the red dress is more expensive than the blue one.
18 Reading is more boring than watching TV=> Watching TV is more interesting than reading.
18 Mr.Hai usually has stomach problems.He eats dinner very close to the bedtime(so)
-> Mr Hai eats dinner very close to the bedtime so he usually has stomach problems.
19 My dad has a lot o carved eggsHe has never sold any of them(but)
-> My dad has a lot of carved eggs but he has never sold any of them.
20 You will get a breathing problem .Clean your bed room more regularly(or)
-> Clean your bedroom more regularly or you will get a breathing problem.
21 It/be/good idea/eat/different/kind/fruit/vegetable/everyday
-> It is a good idea to eat different kinds of fruit and vegetables every day.
22 My brother/not like/ice-skating/because/think/it/dangerous
-> My brother doesn't like ice-skating because he thinks it is dangerous.
e srntences
1 There is a big libary in Lan's school=> Lan's school has a big library
2 Lan learns Math very well => Lan is very good at Math
3 Which subject do you like best?=> What is your.= favorite subject?
4 Why don't we go swimming=> What about going swimming?
5 The birhday cake is very swimming ?=> What a swimming birthday cake!
6 when is her birthday?=> what is her date of birth
7 Nam/works more hours than Lan => Lan works fewer hours than Nam
8 Nile river is linger than any rivers in the world => Nile river is the longest river in the world
9 the school libary has over five thousands books=> There are over five thousands books in the school library
10 HA noihas many interesting places=> There are many interesting places in hanoi
11 I have fewer toys than my younger sister=> My younger sister has more toys than me
12 Lam has ten days off for this summer vacation => Lam has a ten-day trip for this summer vacation
13 I often walk from home to school in ten minutes
=> It takes me ten minutes to walk from home to school
14 It takes me about two hours each day to do my homework => I spend
15 Do you enjoy listening to music?
=> Are you interested in listening to music?
16 Mai drinks more milk than her brother=> Mai's brother drinks less milk than her
17 The blue dress is chesper than the red one
=> the red dress is more expensive than the blue one
18 Reading is more boring than watching TV=> Watching TV is more interesting than reading
18 Mr.Hai usually has stomach problems.He eats dinner very close to the bedtime(so)
mr.hai eats dinner very close to the bedtime so he usually has stomach problems
19 My dad has a lot o carved eggsHe has never sold any of them(but)
my dad has a lot of carved eggs but he has never sold any of them
20 You will get a breathing problem .Clean your bed room more regularly(or)
clean your bedroom more regularly or you will get a breathing problem
21 It/be/good idea/eat/different/kind/fruit/vegetable/everyday
iit is a good idea to eat different kinds of fruit and vegetable every day
22 My brother/not like/ice-skating/because/think/it/dangerous
my brother doesn't like ice-skating because he thinks it is dangerous