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ai giải giúpEx2: Stress Với N , adj ( 2 âm tiết ) à 1st , V ( 2 âm tiết) à 2nd 1.A. yoga                           B. music                  C. relax             D. hobby         2 – 12. A. dirty                          B. around                C. noisy             D. peaceful3. A. future                        B. locate                  C. solar              D. wireless4. A. surround                   B. cottage                C. robot             D. planet5.A. reuse...
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ai giải giúp

Ex2: Stress

Với N , adj ( 2 âm tiết ) à 1st , V ( 2 âm tiết) à 2nd

1.A. yoga                           B. music                  C. relax             D. hobby         2 – 1

2. A. dirty                          B. around                C. noisy             D. peaceful

3. A. future                        B. locate                  C. solar              D. wireless

4. A. surround                   B. cottage                C. robot             D. planet

5.A. reuse                          B. reduce                C. prepare                    D. mention

6.A. bottle                          B. paper                  C. symbol                    D. reuse

7. A. picnic                        B. reduce                C. plastic           D. water

8. A. channel                                B. programme           C. distance              D. control

9. A. garden                       B. summer              C. support                    D. planet

10.A. replace                     B. supply                 C. provide                    D. sorrow

11. A. control                    B. giant                   C. solar              D. software

12.A. picnic                       B. reduce                C. plastic           D. water

Ex3. MUTIPLE CHOICE

A. Thì quá khứ đơn – từ để hỏi – giới từ

0."Do you think that our houses will be___space?"

     A.in                         B.on                       C.at     D.to

1. We also watch films ______smart phones.

     A.in                         B.at                         C.on     D.to

2. "Do you think we will________holiday to the Moon?"

     A.go                        B.go on                   C.go on the     D.go for

3."     ___do you do judo?" - "Twice a week.".

         A. When                 B. Where         C. How often          D. Why

4.      ___sports do you like watching on TV?  .

         A. How                   B. What         C. Do                      D. How often

5. Last summer, I_____ fishing with my uncle in the afternoon.

         A. go                       B. went         C. goes                    D. going

6. I like watching football matches, but I am not very good____ playing football.

         A. at                        B. in         C. on                       D. for

7.My friend Mark is very good ________ volleyball. He plays volleyball very well.

     A. in                            B. on                        C. at                                                        D. with

8.  We often go swimming ________ Sunday morning.

     A. in                            B. on                        C. at                                                        D. for

9.________ are the Olympic Games held? - Every four years.

     A. When                     B. Where                           C. How long               D. How often

10.                                    I _______ born on the first of May.

     A. were                       B. was                               C. are                          D. is

11.There .________ any eggs in the packet when I______ the kitchen.

     A. was/ come              B. were/ come                   C. was/ came          D. were/ came

12.__________. you attend yoga class when I___________ at home?

     A. Did/ stayed                                                       B. Didn’t/ didn’t stayed

     C. Did/ didn’t stayed                                             D. Did/ stayed

13.The meeting .___________5 minutes ago.

     A. finished              B. finish                  C. did not finish                      D. did finish

14.     When _______ she _____________ the report?

     A. do/ finish            B. did/ finished       C. did/finish D. didn’t/ finished

15.     I ___________. my close friend a cushion for her chair yesterday.

     A. gave                    B. give                    C. gived     D. given

16.Yesterday, I ___________ to a souvenir shop near the exit of the aquarium.

     A. go                       B. gone                   C. went     D. goes

B. Thì hiện tại hoàn thành

17.I_____the money from him yet.

     A. haven’t received                                B. don’t receive

     C.will receive                                          D. am receiving

18.     They_____ for nearly 50 years.

     A. marry                                                  B. have been married

     C. married                                               D.will marry

19.     How many times ______there so far? A few times.

     A. have you been                                    B. would you be

     C. were you                                            D. had you been

20.We_____ almost every lesson in this book so far.

     A. study                   B. studies                C. has studied                          D. have studied

21. We_____that television program.

     A. never watch                                       B. not never watch

     C. have never watched                           D. has never watched

22.     Up to then, I_____such a big fire.

     A. have never seen                                 B. had never seen

     C. never seen                                          D. never see

23.     I____her since I      _____a student.

     A. know/ am                                           B. knew/ was

     C. have known/ am                                D. have known/ was

24.     _____get tired of answering the same questions every day?

     A. Have you ever                                    B. Had you ever

     C. Do you ever                                       D. Are you ever

C. Thì tương lai đơn      

25.We _____ have time to help you tomorrow.

     A. may                    B. will                     C. must     D. could

26.In the future, machines           ______all the work for us.

     A. are doing            B. will do                C.were doing                            D. do

27.I hope I _____ find it.

     A. will                     B. could                 C. shall     D. must

28.     ______________________ (people/ live) on the Moon someday?

29.     What ______________________ (the cars/ look) like in 20 years?

30.     ______________________ (robots/ replace) humans?

31.     Where ______________________ (you/ be) in 2040?

32.     When ______________________ (humans/ five) on other planets?

33.     _________________ (houses/ be) more environmentally friendly in the future?

34.     ______________________ (computers/ take) over the world?

35.     How ______________________ (fashion/ change)?

 

D. Câu điều kiện loại I

36. If we_______ waste paper, we will save a lot of trees.

A. repeat                 B. recycle                C. rewrite                     D. remake

37. If it _____ fine tomorrow, we will go to the coast.

A. will be                B. was                                C. is                            D. being

38. You_____  yourself  ill if you don’t eat properly.

A. were to make                B. make                 C. would make       D. will make

39. If people_______-public transport, there will be less pollution.

A. used                    B. use                      C. could use                D. will use

40. I______ you if you need my help.

A. am helping                    B. could help                     C. will help             D. helped

41. Come on! _____ we hurry, we’ll miss the plane!

A. if                         B. unless                 C. in case                  D. supposed

42. If I see him, I _____ him a gift.

A. give                    B. would give                    C. will give              D. gave

43. If you don’t keep silent, you ________wake the baby up.

A. will                     B. would                 C. had                        D. can

44. 1. If the train is late, we ………………….. to the office.

A. walk                   B. will walk            C. would walk              D. walks

45. She …………………….. if she has time.

A. calls                    B. would call                     C. will call                   D. calling

46. If it ……………………… too much, I will buy the smaller one.

A. costs                   B. will cost              C. would cost               D. cost

47. If the class. ………………………. full, we will find another one.

A. are                      B. will be                C. were                     D. is

48. What will we do if the taxi ………………………..?

A. don’t come                   B. didn’t come        C. doesn’t come          D. had not come

 

E. Câu so sánh hơn nhất

49. Do you know__________ drink in Viet Nam?

A. popular        B. more popular  C. the most popular         D. popularest

50. She is ______ singer I’ve ever met.

A. worse                      B. bad                        C. the worst                       D. badly

51. She sings _______ among the singers I have known.

A. the most beautiful                    B. the more beautiful

C. the most beautifully                 D. the more beautifully

52. She is_________ student in my class.

A. most hard-working                  B. more hard-working

C. the most hard-working            D. as hard-working

53. She runs ___________ in my class.

A. the slowest           B. the most slow           C. the slowly          D. the most slowly

54. She is the most ___________  girl in our class.

A. intelligent                      B. intelligentest                  C. tall           D. tallest

55.Lan is the most_____________ student in my class.

A. hard­work                      B. hard­working                  C. good           D. best

56. This book is the ___________________of all

A. bored                             B.boring                  C. more boring         D. most boring

57. He finished the test _____________of all.

A. rapidly                B. the most rapidly C. most rapidly          D. more rapidly

58. That flight ticket is _________ of all.

A. expensive B. the most expensive       C. more expensive       D. the expensive

Ex 4: Closest in meaning

59. I'm sorry. I didn't mean to interrupt you. Please, go on and finish what you were saying.

A. talk                      B. quit                               C. continue                  D. stop

60. They decided to postpone their journey till the end of the month because of the epidemic.

A. take up               B. turn round                     C. put off                     D. do with

61. At weekends the city centre is always packed with people.

A. busy                              B. crowded                   C. full                          D. quite

62. It’s a good idea to swap books with our friends.

A. change                B. send                    C. exchange                           D. pull

63. Jack, come and give me a hand with cooking.

           A. prepare               B. help                    C. do                            D. make

64. My mother : “You have to look after your younger sister when I go out”

A. take after            B. take care of                   C. take over                 D. look up

65. Who is going to look after your children when you’re at work?  

      A. search                        B. regard               C. take care of                         D. help                   

66. I want to  take part in the trip to the countryside.

A.   participate in            B. look after         C. take over                                                                                                                                                   D. take off

67.   We had a fantastic time  in Ha Noi.

A.   wonderful                B. interesting        C. good                                                                                                                                                               D. exciting

Ex5: Communication:

68. A: “ Thank you for helping me yesterday”  B: …      

A. Not at all. B. It’s my pleasure. C. It’s my fault.           D. Congrats!

69. Havy: “Thanks for your help, Judy.”  Judy: “……..”

A. With all my heart                               B. Never remind me

C. It’s my pleasure                                  D. Wish you

70. Alice is talking to Mary about their plan of the weekend.
Alice: "How about visiting the church this weekend?"    Mary: "......"

A. Well done                B. Not at all             C. That's a good idea     D. No, thanks

71- Peter: “What a lovely house have!”            - Tom: “__________”

A. No problem                                                            B. Of course not,  it’s not costly.

C. Thank you. Hope you will drop in.                         D. I think so.

72. Mary: “How did you get here? ”      David: “___________”

A. I came here yesterday            B. The train was late

C. I was tired.                          D. I came here by train

73. “Congratulations to you on winning the first prize”- “……………”

A. You’re welcome.

C. It’s my pleasure

B. Thanks a lot

D. It doesn’t matter

74.  “What a wonderful picture!” – “……………”

A. I’m glad to hear that

C. It’s nice of you to say so

B. You don’t need to say so

D. Of course, I think so

75. Daughter: “Dad! I have just won the first prize in the Olympic English Contest.”

Father: “__________________”

   A. Congratulations!           B. That’s a good idea.

   C. Thank you.                    D. I’d love to.

76.  Peter: “Don’t fail to send your parents my regards.”

Susan: “_____.”

   A. You’re welcome.          B. Thanks, I will.

   C. Good ideas, thanks       D. It’s my pleasure.

77. “I’ve passed my driving test”- John:                       

A. Congratulation.                                 B. That’s good idea.

C. It’s nice for you to say so                       D. Do you?

78. A: “ Would you like to go swimming with me tonight?”  B: “__________”

A. Yes, I will                     B. No, I won’t        C. Yes, I’d love to                  D. Never

Ex 6: Writing:

Dang 1: HTHT va QKD

79. I started collecting stamps last winter.

A. I have collected stamps since last summer.

B. I have started collecting stamps since last summer.

C. I have collected stamps for last winter

D. I have not collected stamps before

80. They began playing tennis in the spring of 2012.

A. They have playing tennis since the spring of 2012.

B. They haven’t played tennis since the spring of 2012.

C. They have played tennis since the spring of 2012.

D. They have played tennis for the spring of 2012.

81.  My father stopped smoking in 2014.

A.My father hasn’t smoked since 2014.

B. My father has smoked since 2014.

C. My father hasn’t smoked for 2014.

D. My father hasn’t smoked in 2014.

82. I began working as an activist when I was 20 years old.

A. I have working  as an activist since I was 20 years old.

B. I have been working  as an activist since I was 20 years old.

C. I have worked  as an activist for I was 20 years old.

D. A. I have worked as an activist since I was 20 years old.

83.  We started learning English 10 years ago.

A. We have learned English for 10 years.

B. We has learned English for 10 years.

C. We have learned English since 10 years.

D. We have learn English for 10 years.

Dang 2: So sanh hon nhat

84. English is more popular than any other languages in the world.

A. English is more popular language in the world.

B. English is the popular language in the world

C. English is the most popular language in the world

D. English is the least popular language in the world

85.Lan is more intelligent than any girls in the class.

A. Lan is the intelligentest girl in the class

B. Lan is the most intelligent girl in the class

C. Lan is intelligent in the class

D. Lan is the least intelligent girl in the class

86. Noone in the class is more patient than Kien.

A. Kien is the more patient in the class

B. Kien is the least patient in the class.

C. Kien is the patient in the class.

D. Kien is the most patient in the class.

Dang 3: Đặt câu hỏi cho từ gạch chân:

87. My mother watches TV three hours a day.

A. How many hours does your mother watch TV a day?

B. When does your mother watch TV a day?

C. How often does your mother watch TV a day?

D. How many hours do your mother watch TV a day?

88. My uncle often goes fishing on weekends.

A. When does your uncle often goes fishing ?

B. When does your uncle often go fishing ?

C. Where does your uncle often goes fishing ?

D. What does your uncle often goes fishing ?

89. Tom put the remote control on the bookshelf.

A. Where did Tom put the remote control?

B. Where do Tom put the remote control?

C. Why did Tom put the remote control?

D. When did Tom put the remote control?

90. They go to the English club twice a week.

A. When do they go to the English club?

B. What do they go to the English club?

C. How often do they go to the English club?

D. How often do they goes to the English club?

Dạng 4: Dùng từ gợi ý viết thành câu hoàn chỉnh:

91. If/ we/ cycle/ school/ every day/ we/ keep/ air/ clean and fresh

A. If we cycled to school every day, we will keep the air clean and fresh.

B. If we cycle to school every day, we  keep the air clean and fresh.

C. If we cycle to school every day, we will keep the air clean and fresh.

D. If we cycle to school every day, we will keep the air clean and fresh.

92. If/ we/ use/ buses/ we/ reduce/ pollution.

A. If we use buses, we will reduce pollution.

B. If we will use buses, we  reduce pollution.

C. If we uses buses, we will reduce pollution.

D. If we use buses, we reduces pollution.

93. Although/ I/ like/ cartoons/ I/ not/ watch/ them/ much.

A.  Although I likes cartoons,  I do not watch them  much.

B.  Although I like cartoons,  I  not watch them  much.

C. Although I like  cartoons,  I do not watch them  much.

D. Although I likes cartoons, I  not watches them  much.

94. Australians/ enjoy/ Christmas/ although/ Christmas season/ summer.

A. The Australians enjoy Christmas although Christmas season is in summer.

B. The Australians enjoys Christmas although Christmas season is in summer.

C.  Australians enjoy Christmas although Christmas season is in summer.

D. The Australians enjoy Christmas although Christmas season in summer.

95. Although/ my mother/ tired/ she/ have to/ finish/ housework.

A. Although my mother tired, she has to  finish her housework.

B. Although my mother is tired, she have to finish her housework.

C. Although my mother is tired, she had to finish her housework.

D. Although my mother is tired, she has to finish her housework.

1
1 tháng 8 2021

mình đg cần gấp nha

chỉ cần ghi sô câu và đáp án thui nha

 

Câu 12. Cho biểu thức A = - - - ( 1).2.( 3).4.( 5).6 , chọn khẳng định đúngA. A là số nguyên âm B. A à số nguyên dương C. A = 0 D. A = -300Câu 13. Không tính kết quả, hãy so sánh ( 76).72 - với 37.57A. ( 76).72 37.57 -  B. ( 76).72 37.57 - = .C. ( 76).72 37.57 -  . D.Tất cả các phương án đều saiCâu 14. Cho M = - - ( 188).( 16).24.25 , chọn khẳng định đúngA. M  0 B. M  0 C. M = 0 . D.Tất cả các phương án trên đều saiCâu 15. Cho M = -...
Đọc tiếp

Câu 12. Cho biểu thức A = - - - ( 1).2.( 3).4.( 5).6 , chọn khẳng định đúng
A. A là số nguyên âm B. A à số nguyên dương C. A = 0 D. A = -300
Câu 13. Không tính kết quả, hãy so sánh ( 76).72 - với 37.57
A. ( 76).72 37.57 -  B. ( 76).72 37.57 - = .
C. ( 76).72 37.57 -  . D.Tất cả các phương án đều sai
Câu 14. Cho M = - - ( 188).( 16).24.25 , chọn khẳng định đúng
A. M  0 B. M  0 C. M = 0 . D.Tất cả các phương án trên đều sai
Câu 15. Cho M = - - - - - ( 1).( 2).( 3).( 4)........( 19) , chọn khẳng định đúng
A. M  0 B. M  0 . C. M = 0 . D.Tất cả các phương án trên đều sai
Câu 16. Cho A = - - + - + ( 9).( 3) 21.( 2) 25 và B = - - + - - - ( 5).( 13) ( 3).( 7) 80 , chọn khẳng định đúng
A. A B  B. A B = C. A B  . D.Tất cả các phương án đều sai
Câu 17. Cho M = - - ( 2) 2 2020 2020 , chọn khẳng định đúng
A. M  0 B. M  0 . C. M = 0 . D.Tất cả các phương án đều sai
Câu 18: Tính nhanh 735 60 235 - + ( ) . Kết quả nào sau đây sai?
A. 735 60 235 735 60 235 500 60 440 - + = - - = - = ( )
B. 735 60 235 735 60 235 735 60 235 675 235 440 - + = - - = - - = - = ( ) ( ) .
C. 735 60 235 700 35 60 200 35 510 - - = + - - + = .
D. 735 60 235 700 35 60 200 35 700 200 60 440 - - = + - - - = - - = .
Câu 19: Kết quả đúng của phép tính - - 3 5 là:
A. -2 . B. +2 . C. +8. D. -8.
Câu 20: Thực hiện phép tính - - - 215 (131 215) được kết quả:
A. 131 . B. -215.
C. 215 . D. -131
 

1
16 tháng 12 2021

Mng giúp em với ạ 

3 tháng 12 2021

Câu 1: B. Smiled              / d / . Còn lại là: / t /

Câu 2: D. Disturb ( nhấn trọng âm số 2, các từ còn lại nhấn trọng âm đầu )

 

3 tháng 12 2021

Bài này mình làm ở trên rồi nha! vui

3 tháng 12 2021

Câu 1: B. Smiled              / d / . Còn lại là: / t /

Câu 2: D. Disturb ( nhấn trọng âm số 2, các từ còn lại nhấn trọng âm đầu )

 

\(\dfrac{x}{3}-2=\dfrac{1}{15}\)

=>\(\dfrac{x}{3}=2+\dfrac{1}{15}=\dfrac{31}{15}\)

=>\(x=\dfrac{31}{15}\cdot3=\dfrac{31}{5}\)

NV
21 tháng 2 2021

Nếu có 2 số đồng thời bằng 0 BĐT tương đương \(0\le\dfrac{3}{4}\) hiển nhiên đúng

Nếu ko có 2 số nào đồng thời bằng 0:

\(VT=\dfrac{bc}{a^2+b^2+a^2+c^2}+\dfrac{ca}{a^2+b^2+b^2+c^2}+\dfrac{ab}{a^2+c^2+b^2+c^2}\)

\(VT\le\dfrac{bc}{2\sqrt{\left(a^2+b^2\right)\left(a^2+c^2\right)}}+\dfrac{ca}{2\sqrt{\left(a^2+b^2\right)\left(b^2+c^2\right)}}+\dfrac{ab}{2\sqrt{\left(a^2+c^2\right)\left(b^2+c^2\right)}}\)

\(VT\le\dfrac{1}{4}\left(\dfrac{b^2}{a^2+b^2}+\dfrac{c^2}{a^2+c^2}+\dfrac{a^2}{a^2+b^2}+\dfrac{c^2}{b^2+c^2}+\dfrac{a^2}{a^2+c^2}+\dfrac{b^2}{b^2+c^2}\right)=\dfrac{3}{4}\)

Dấu "=" xảy ra khi \(a=b=c\)

21 tháng 2 2021

\(bc\le\dfrac{\left(b+c\right)^2}{4}\Rightarrow\dfrac{bc}{a^2+1}\le\dfrac{\left(b+c\right)^2}{4\left(a^2+1\right)}\) chứng minh tương tự với mấy cái còn lại ta dc           \(\dfrac{bc}{a^2+1}+\dfrac{ac}{b^2+1}+\dfrac{ab}{c^2+1}\le\dfrac{1}{4}\left[\dfrac{\left(b+c\right)^2}{a^2+1}+\dfrac{\left(a+c\right)^2}{b^2+1}+\dfrac{\left(a+b\right)^2}{c^2+1}\right]\) .Thay a^2 +b^2 +c^2 =1 vào vế phải ta dc\(VT\le\dfrac{1}{4}\left[\dfrac{\left(b+c\right)^2}{2a^2+b^2+c^2}+\dfrac{\left(a+c\right)^2}{2b^2+c^2+a^2}+\dfrac{\left(a+b\right)^2}{2c^2+a^2+b^2}\right]\)

áp dụng bunhiacopski dạng phân thức ta dc\(VT\le\dfrac{1}{4}\left[\dfrac{b^2}{a^2+b^2}+\dfrac{c^2}{a^2+c^2}+\dfrac{a^2}{b^2+a^2}+\dfrac{c^2}{b^2+c^2}+\dfrac{a^2}{c^2+a^2}+\dfrac{b^2}{c^2+b^2}\right]\)                           \(VT\le\dfrac{1}{4}\left[\dfrac{a^2+b^2}{a^2+b^2}+\dfrac{c^2+a^2}{c^2+a^2}+\dfrac{c^2+b^2}{c^2+b^2}\right]\) \(\Rightarrow VT\le\dfrac{1}{4}\left(1+1+1\right)=\dfrac{3}{4}\left(đpcm\right)\)

19 tháng 1 2016

Ta co :\(M-N=\left(a+b-1\right)-\left(b+c-1\right)\)

            \(M-N=a+b-1-b-c+1\)

            \(M-N=\left(a-c\right)+\left(b-b\right)+\left(1-1\right)\)
            \(M-N=a-c+0+0\)

            \(M-N=a-c\)

Vi M>N \(\Rightarrow\) M-N la so nguyen duong \(\Rightarrow\) hieu a-c la so nguyen duong

TICK CHO MINH NHA .MINH LA NGUOI GIAI NHANH NHAT DO VA RAT CHI TIET TICK NHA BAN!!!!!!

19 tháng 1 2016

5 so nguyen do deu bang am 3

29 tháng 7 2017

d) 812 và 128

Ta có : 812 = (96)2 = 5314412

           12= (124)2 = 207362

=> 534412 > 207362

=> 812 >  128

29 tháng 7 2017

a) 3và 63

Ta có : 36 = (32)3 = 93

            63 = 63

=> 93 > 63

=> 36 >  63