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You read a book in the sun-it’ll do harm to your eyes. A.couldn’t B.wouldn’t C.n

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You read a book in the sun-it’ll do harm to your eyes. A.couldn’t B.wouldn’t C.n

You          read a book in the sun—it’ll do harm to your eyes.

A.couldn’t     B.wouldn’t     C.needn’t          D.mustn’t

试题答案

D

解析: