—Tony,youmusthavenoticedthestudentwhobrokethewindow.—I...

问题详情：

 —Tony, you must have noticed the student who broke the window.

—I’m sorry. I _______ attentively.

A. studied         B. was studying    C. am studying              D. would study

【回答】

B

知识点：过去进行时及其被动式

题型：选择题