--Who is knocking at the door?--It Mr. Black, because he Washington.A. can't be;has gone toB. may be;has been toC. must’t be;has gone toD. may be;went 题目和参考答案——青夏教育精英家教网—

题目内容

——Who is knocking at the door?

——It ______ Mr. Black, because he_______Washington.

A. can't be;has gone toB. may be;has been to

C. must’t be;has gone toD. may be;went

【解析】

试题分析：句意：谁在敲门？不可能是布莱克先生。因为他已经去华盛顿了。can’t be意为“不可能是”，是对事情的否定推测，has gone to sp意为“已经去了某地还没有回来”；has been to sp意为“去过某地已经回来了”；故选A。

考点：考查情态动词和现在完成时。

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