问题补充:
(·湖南,34)—I don understand why you didn go to the lecture yesterday afternoon.
—Im so sorry.But Imy homework.
A. had done
B. was doing
C. would do
D. am doing
答案:
A. had done
(答案→)B. was doing
C. would do
D. am doing
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。