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】

試題分析：考查時(shí)態(tài)。根據(jù)句意可知，這是表示“在一個(gè)動(dòng)作發(fā)生的過(guò)程中，發(fā)生了另外一件事情”，所以后面的用進(jìn)行時(shí)態(tài)，前面用一般過(guò)去時(shí)態(tài)。句意：Tom 在沒(méi)有注意的時(shí)候，溜進(jìn)了屋里。故A正確。

考點(diǎn)：考查時(shí)態(tài)

 

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