If anything         the machine, please let us know.

A. happens on           B. happens to                   C. happened on               D. will happen to

 

【答案】

B

【解析】

試題分析:句意:如果這臺機器發(fā)生了什么事情,請讓我們知道。Happen 常用于sth happen to sb/sth,某人/物發(fā)生了某事。當主句描述將來動作時,條件狀語從句中常用一般現(xiàn)在時態(tài)表示將來的動作,故選B。

考點:考查固定短語及時態(tài)。

 

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