【題目】I ______ TV last night when I heard knocks at the door.

A. watch B. was watching C. watched

【答案】B

【解析】

試題分析:句意:昨天晚上,我聽到敲門時(shí),正在看電視。A. watch一般現(xiàn)在時(shí)態(tài);B. was watching過(guò)去進(jìn)行時(shí)態(tài);C. watched一般過(guò)去時(shí)態(tài)。聽到敲門聲時(shí),我正在看電視。表示一個(gè)過(guò)去動(dòng)作發(fā)生時(shí),另一個(gè)過(guò)去動(dòng)作正在發(fā)生。句子用過(guò)去進(jìn)行時(shí)態(tài)。故選B。

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