问题补充:
—I don’t understand why you didn’t go to the lecture yesterday afternoon.
—I’m so sorry.But Imy homework. (·湖南,34)
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:
考查动词时态的用法。句意为:——我无法理解你昨天下午为什么没参加讲座。——实在对不起,但是那时我在做作业。根据语境可知此处表示昨天下午举行讲座的那段时间我正在做作业,用过去进行时表示过去的时间段里正在发生的事情。