题目内容

One Friday, we were packing to leave for a weekend away ______my daughter heard cries for help.
A．afterB．whileC．sinceD．when
D

试题分析：be doing sth....when...,正在做某事的时候，这时突然。。。句意，一个星期五，我们正打包离开去度周末，我女儿突然听到呼救声。while 当。。。的时候，要跟延续性动词连用。
点评：连词的用法辨析，要注意分析主从句之间的关系，再确定相应的连词，同时注意不同的连词的语义及用法区别。
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