(2013·湖南，34)—I don't understand why you didn't go to the lecture yesterday afternoon.

—I'm so sorry.But I________my homework.

A．had done B．was doing C．would do D．am doing

 

B

【解析】

考查動詞時態(tài)。根據(jù)語境，對話中的第二個人昨天下午沒去聽課，而是在做作業(yè)，故使用過去進(jìn)行時態(tài)，表示過去一段時間內(nèi)在持續(xù)發(fā)生的動作，故選B。

 

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