— May I smoke here?
— No, you ________. Can’t you read the sign “NO SMOKING”?

A．mustn’t B．won’t C．needn’t D．Don’t have to

A

解析試題分析：mustn’t表示“禁止”。won’t表示“不愿”。needn’t, not have to都表示“不必”。故答案為A。
考點(diǎn)：情態(tài)動(dòng)詞。

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