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【题目】Alice won’t answer the phone if she the number.

A. knew B. doesn’t know C. will know D. didn’t know

【答案】B

【解析】

句意:Alice如果遇到不认识的电话号码,她是不会接的。if 引导的条件状语从句在时态上要遵循主将从现的原则,和if 连着的句子是从句用一般现在时。根据句意需要用一般现在时的否定,所以是doesn’t know. 故选B。

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