--Ourclassmateswenttoaconcertyesterdayafternoon. ---Wha...

问题详情：

--Our classmates went to a concert yesterday afternoon.

  ---What a pity! I      my homework.

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

【回答】

B

知识点：动词时态

题型：选择题