—Tony, you must have noticed the student who broke the glass.—I'm sorry.I________attentively.
#99685
A
studied 
B
was studying
C
am studying 
D
would study
推荐题目
Thank you for helping me. I       the final exam without your timely help. 
#102591
A
have failed
B
will fail
C
would have failed
D
must have failed
Jack doesn’t smoke now, but he ______ for almost twenty years.
#101774
A
smoked
B
was smoking
C
has smoked
D
had smoked
------- Hi, Jane! How nice meeting you here in London! -------Oh, it’s you, Frank. I ____ that you _____ in London.
#103834
A
didn’t expect, were
B
don’t expect, are
C
didn’t expect, are
D
don’t expect, were