问题 选择题

While she _____ TV, someone _______ at the door.

A.watch, knocked

B.was watching, knocked

C.watching, knocking

D.was watching, is knocking

答案

B

题目分析: 句意:当她在看电视时,有人敲门。knock at 敲门;while当……的时候,引导的时间状语从句动词为延续性动词,进行时态,与主句同时发生,故选B

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单项选择题 A3/A4型题