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I. True or False. Tick the correct box.
True False
1. T You must close the door before going out.
2. F You mustn‟t do your homework.
3. F You mustn‟t obey your parents.
4. T You must go to school on time.
5. F You must walk on the grass.
6. T You mustn‟t shout at me.
7. T You must brush your teeth before going to bed.
8. F You mustn‟t eat fruit and vegetables.
II. Complete the sentences with must or mustn't.
1. You must help your mother with the heavy box.
2. It‟s very cold. You mustn't go out.
3. You must look after the house when your parents are awaff
4. You must wash your face in the morning.
5. You must take your umbrella because it‟s raining.
6. You mustn't drink that milk, it‟s very hot.
7. You mustn't make noise in the class.
8. It‟s dangerous, you mustn't touch that wire.
9. You mustn't be rude to your teacher.
10. In the class, you must study hard.
III. Give the correct form of superlative.
1. This is a TALL building.
→ This is the tallest building in London.
2. That was an EASY exercise.
→ That was the easiest exercise of the test.
3. This is a COMFORTABLE armchair.
→ This is the most comfortable armchair in this shop.
4. This is a BIG cheese burger.
→ This is the biggest cheese burger of the McDonald‟s Company.
5. That was a very BAD conversation.
→ That was the worst conversation I have had.
6. That was a DIFFICULT exercise.
→ That was the most difficult exercise of the test.
7. He‟s got a GOOD pen.
→ He‟s got the best pen of the class.
8. This is an INDIFFERENT pupil
→ This is the most indiffferent pupil of my class.
9. He is a FUNNY boy.
→ He is the funniest boy in the world.
10. He is LESS young than the others.
→ He is the least young student of my class.
1 .Tuan Chau is the largest .... in Ha Long Bay
A : island
B : mountain
C : beach
2. You ... make a lot of noise in the library
A : must
B : mustn't
C : have to
3 .We .... do more exercises to say fit
A : must
B : mustn't
C : are
4 : You .... turn the music to loud
A : must
B : mustn't
C : can
Underline the best options to complete these sentences
1. Chirldren ..........(must/mustn't/must to/ mustn't to) pick flower in the school garden.
2. Look! The boy .........marbles in the playground. (play/are playing/to play/plays)
- Must
+ We must arrive on time.
+ We must do homework
+ We must put the lrash in the bin.
- Mustn't
+ We mustn't play football
+ We mustn't pick flowers in the school garden.
+ We mustn't throw the rubbish in the street.
It is wrong for us to throw our trash = We must not litter the garbage
10. You (mustn't needn't have a university degree to become a police officer.
11. It's raining outside. Tim (must/may) take his umbrella
12. I can give you my car, so you (mustn't ?don't have to) buy a new one.
13. They (don't have to/ have to be in a hurry, because they have got more than enough time.
14. Tomorrow is Sunday. You (don't have to/ mustn't) get up very early
15.His eyes were so bad that he(shouldn’t/couldn’t) read the number on the board
16.My car broke down so I ( had to/could)come by bus
17.(Shouldn’t I/May I) ask some question?-Ok,go ahead
18. In most developed countries, people (mustn't/ don't need to) boil water before they drink it.
11. This is the key. You……..forget to take it with you when going out
. A. should B. have to C. mustn't D. needn't
12. You………..introduce me to Dr. Gray. We have already met.
A. shouldn't B. needn'tC. mustn'tD. couldn't
13. "I have got a headache.- "You………..go to see the doctor."
A. may B. Could C. Should D. might
14.1………find my own way there. You ……wait for me.
A. should ?can't B. have to / must C. can/needn't D. might / mustn't
15. You ……. take your umbrella along with you today. It……… rain later on this afternoon.
A. ought to mustn't B. needn't/ willC. will / must D. should/might
16. I am not deaf. You………shout.
A. must B. mustn't C. Need D. needn't
17. I do not mind at all. You .........apologize.
A. shouldn't B. needn't C. mustn't D. oughtn't to
18. It is a top secret. You_ _tell anyone about it.
A. mustn't B. needn'tC. mightn't D. won't
19. We have plenty of time for doing the work. We………… be hurried.
A. needn't B. shouldn't C. mustn'tD. mayn't
20. Susan………. hear the speaker because the crowd was cheering so loudly.
A. mustn't B. couldn't C. can’t D. needn’t
Mustn't or don't/doesn't
1. Visitor __DOESN;T___ feed the animal
2. Tim __DOESN'T___ wear uniform at school
3. These are life in the building, so I ______DON'T__ climb the stairs
4. Staff ____DOESN'T__ smoke when serving customers
5. Sally is extremely rich. She ___MUSTN'T_____ work
6. I don't want anymore to know about our plan. You _MUSTN'T___ tell anyone
7. You __MUSTN'T__ be a good player to enjoy a game of tennnis
Mustn't or don't/doesn't
1. Visitor ___mustn't__ feed the animal
2. Tim __doesn't___ wear uniform at school
3. These are life in the building, so I __mustn't______ climb the stairs
4. Staff ____mustn't__ smoke when serving customers
5. Sally is extremely rich. She ___doesn't_____ work
6. I don't want anymore to know about our plan. You __mustn't__ tell anyone
7. You __mustn't__ be a good player to enjoy a game of tennnis