— I don’t understand why you didn’t go the lecture yesterday afternoon?— I am so

题干

— I don’t understand why you didn’t go the lecture yesterday afternoon?
— I am sorry. But I _________ my homework.

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

上一题下一题 0.65难度单项选择更新时间:2017-09-06 10:26:21

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