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

試題分析：be doing sth....when...,正在做某事的時候，這時突然。。。句意，一個星期五，我們正打包離開去度周末，我女兒突然聽到呼救聲。while 當(dāng)。。。的時候，要跟延續(xù)性動詞連用。
點評：連詞的用法辨析，要注意分析主從句之間的關(guān)系，再確定相應(yīng)的連詞，同時注意不同的連詞的語義及用法區(qū)別。
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