We talk loudly when we see the sign “Be quiet on the wall. A. must B. mustn’t ——青夏教育精英家教网——

摘要： We talk loudly when we see the sign “Be quiet on the wall. A. must B. mustn’t C. need D. needn’t

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We _______ talk loudly when we see the sign "Be quiet" on the wall.

A. must
B. mustn't
C. need
D. needn't

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—We ______ talk loudly when we see the sign "Be quiet" on the wall.
—Yes, you are right. We should be polite in public.

A. must
B. mustn't
C. need
D. needn't

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We ________ talk loudly when we see the sign“Be quiet”on the wall．

A．must

B．mustn’t

C．need

D．needn’t

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