----Idon’tunderstandwhyyoudidn’tgotothelectureyesterda...

问题详情：

 ---- I don’t understand why you didn’t go to the lecture yesterday afternoon.

  ---- I’m so sorry. But I         my homework.

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

【回答】

B

知识点：动词时态与语态

题型：选择题