用must, mustn"t, can, can"t填空。1. Don"t open your present now! In China you _____

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用must, mustn"t, can, can"t填空。1. Don"t open your present now! In China you _____ wait and open it later.
2. —Can I do cleaning at Spring Festival?
    —No, you_____  .
    —It"s bad luck.
3. In America you _____  open your present immediately.
You don"t have to wait!
4. In Britain you _____  ride your bicycle on the pavement _____. It"s too dangerous.
5. In Britain, you _____ be 18 if you want to drive a car.

答案

1. must 2. can"t 3. can 4. mustn"t 5. must

举一反三

Sixteen-year-olds to watch this kind of movie because it"s too scary.[ ]
A. should allow
B. shouldn"t be allowed
C. should be allowed
D. don"t allow

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—May I try on the jeans?
—Of course you _____.[ ]
A. should
B. need
C. can
D. must

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—May I go out and play games?
—No, you _____. You"ve got a lot of work to do.[ ]
A. can"t
B. needn"t
C. wouldn"t
D. don"t

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The mall will _____ for 12 hours on Sunday.[     ]
A. open
B. opens
C. be open
D. opening

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—Must I hand in my homework today?
—No, you _____. Tomorrow is OK.       [     ]
A. mustn"t
B. wouldn"t
C. can"t
D. needn"t

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