I had a hard time _________ where the post office is. 
#59595
A
finding
B
found
C
finds
D
to find
推荐题目
Mike     his computer and checked his e-mail.
#54405
A
turned on
B
turned off
C
turned up
D
turned down
I think walking is________ our health.
#60413
A
good at
B
bad at
C
well in
D
good for