—Tony,youmusthavenoticedthestudentwhobrokethewindow.—I...

問題詳情：

 —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

知識點：過去進行時及其被動式

題型：選擇題