—Must I make a phone call to him now? —No, you________. You ______ write an email.A.mustn’t; mayB.may not; mustC.shouldn’t; mustD.don’t have to; may
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D解析试题分析：must的否定回答，一般用needn’t或者don’t have to，据此即可判定本题选D。考点：must的否定回答
点评：must的否定回答不用mustn’t，一般用needn’t或者don’t have to。这样的规则熟记即可。