Mum in the kitchen while we TV in the sitting room．( )A．cooked, watchedB．was cooking, were watchingC．cooked, were watchingD．was cooking, watched 题目和参考答案——青夏教育精英家教网—

15．Mum ___________ in the kitchen while we __________ TV in the sitting room．（　　）

	A．	cooked； watched		B．	was cooking； were watching
	C．	cooked； were watching		D．	was cooking； watched

分析当我们在客厅看电视的时候妈妈正在烧饭．

解答答案：B．
结合句意while表示当…时候，表达的是两个动作同时进行，表达的是过去正在进行的事情，故用过去进行时was/were+doing，主语Mum三单，故was，we复数，故were，故答案是B．

点评、while在过去进行时句子中，只能表示某一段时间，不能表示某一点时间．在while引导的时间状语从句中，其谓语动词只能是延续性的，而且也只能与主句中的谓语动词同时发生或存在

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