Cars, buses and bikes ______ stop when the traffic light is red. [ ]A.

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Cars, buses and bikes ______ stop when the traffic light is red.       [     ]
A. must
B. can
C. may
D. need

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举一反三

—Look at that man. He ________ Mr. Wang.
—No. He ________ Mr. Wang. He has gone to Beijing.       [     ]
A. must be, mustn"t be
B. must be, can"t be
C. can be, can"t be
D. can be, mustn"t be

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—Our class won the table tennis match.
—Congratulations! You______proud of it.[ ]
A. can be
B. may be
C. must be

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-___________ I come in?
-Sure. Come in, please.[ ]
A. Will
B. May
C. Must
D. Need

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Everyone _____ fight against pollution.[ ]
A. may
B. should
C. mustn"t
D. needn"t

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— you play the piano?
—No. But I can play the guitar.[ ]
A. Can
B. May
C. Must
D. Should

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