题目内容

It was not until 3 days later that the boy came back to life and explained to the police what_______ to him.

A.was happening

B.was to happen

C.had happened

D.has happened

 

【答案】

C

【解析】考查时态。句意为:两个星期后,那个男孩才苏醒过来,向警方解释到底发生了什么事。happen发生在explain之前,是“过去的过去”,用过去完成时。

 

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