(·高考湖南卷)—I don’t understand why you didn’t go to the lecture yesterday afternoon.—I’m

问题补充：

(·高考湖南卷)—I don’t understand why you didn’t go to the lecture yesterday afternoon.

—I’m 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：选B。题干的意思是：“我无法理解你昨天下午为什么没去听讲座。”“对不起，但是那时我正在做作业。”根据语境可知“做作业”是昨天下午举行讲座的那段时间内正在发生的动作，故用过去进行时，由此可知答案为B。