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试题详情及答案解析
My mother was doing the cleaning in the sitting room ________ the telephone rang.
A.whenB.whileC.sinceD.as soon as
答案:A
试题分析: 句意:妈妈正在起居室清整卫生,突然电话铃响了。此题考查某人正在做某事,突然……用连词when,故选A。
考点:考查连词。