I was doing my homework _______ my mother was doing some sewing. A．during B．when
题型：不详难度：来源：
I was doing my homework _______ my mother was doing some sewing. | A．during | B．when | | C．while | D．after |
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答案
| C |
解析
试题分析：A. during在…期间 B. when当…时候 C. while当…时候D. after在…之后；句意：当我的妈妈在缝衣服的时候，我正在做家庭作业。while 当…时候，强调两个动词同时进行，故选C
点评：when既可以和瞬间动词连用，也可以和延续性的动词连用，while只能和延续性的动词连用，同时while表示两个动词同时进行，往往两个动词都要用进行时态的形式。 |
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