—I don’t understand why you didn’t go to the lecture yesterday afternoon. —I’ m sorry, but I ______ my homework.

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问题 —I don’t understand why you didn’t go to the lecture yesterday afternoon. —I’ m sorry, but I ______ my homework.

选项 A、had done
B、was doing
C、would do
D、am doing

答案B

解析 考查动词时态。根据语境,对话中的第二个人昨天下午没去听课,而是在做作业,故使用过去进行时态,表示过去一段时间内在持续发生的动作,故选B。
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