—Tony, you must have noticed the student who broke the window. —I’m sorry. I _______ attentively. 
#99787
A
studied
B
was studying
C
am studying
D
would study
推荐题目
Prices____ all the time and no one knows when they         stable.
#101890
A
are going up; become
B
have been going up; will become
C
have gone up; will become
D
have been gone up; become