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Tom __________ into the house when no one __________.

A. slipped; was looking C. slipped; had looked

B. had slipped; looked D. was slipping; looked

 

A

【解析】

试题分析:考查时态。根据句意可知,这是表示“在一个动作发生的过程中,发生了另外一件事情”,所以后面的用进行时态,前面用一般过去时态。句意:Tom 在没有注意的时候,溜进了屋里。故A正确。

考点:考查时态

 

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