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—I don’t understand why you didn’t go to the lecture yesterday afternoon.
—I’m so sorry.But I________my homework.                       (2013·湖南，34)
A．had doneB．was doing
C．would doD．a(chǎn)m doing
B

考查動詞時態(tài)的用法。句意為：——我無法理解你昨天下午為什么沒參加講座。——實(shí)在對不起，但是那時我在做作業(yè)。根據(jù)語境可知此處表示昨天下午舉行講座的那段時間我正在做作業(yè)，用過去進(jìn)行時表示過去的時間段里正在發(fā)生的事情。
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