新概念1单项选择while she ___ TV in the living room ,the bell.a.watches ;rings b.is watching ;rang c.was watching ;rang d.watched;was ringing

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新概念1单项选择whileshe___TVinthelivingroom,thebell.a.watches;ringsb.iswatching;rangc.waswatching;rangd.wat

新概念1单项选择while she ___ TV in the living room ,the bell.a.watches ;rings b.is watching ;rang c.was watching ;rang d.watched;was ringing
新概念1单项选择
while she ___ TV in the living room ,the bell.
a.watches ;rings b.is watching ;rang c.was watching ;rang d.watched;was ringing

新概念1单项选择while she ___ TV in the living room ,the bell.a.watches ;rings b.is watching ;rang c.was watching ;rang d.watched;was ringing
应该选c,因为while后面应该用延续性动词,当她正在看电视的时候,门铃响了.看电视的动作是正在发生.