—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
网友回答
A. studied
(答案→)B. was studying
C. am studying
D. would study
解析：句意：--Tony，你一定注意到打破窗户的那个学生了。--对不起，我当时正在专心的学习。从broke
可知是过去的事情，所以学习是在打破窗户的时候，正在做…，用过去进行时，所以选B。