题目内容

【题目】They are good friends. ___________ is no wonder that they know each other so well.

A. This B. That C. There D. It

【答案】D

【解析】句意:他们是好朋友,难怪他们互相如此了解。it作形式主语,真正的主语是that引导的主语从句。

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