---The window is dirty.---I know. It ______ for ages and I’m considering giving the task to our children.
#100885
A
hasn’t cleaned
B
hasn’t been cleaned
C
wasn’t cleaned
D
didn’t clean
推荐题目
30. Because of the heavy snow, a serious accident______to the family.
#103312
A
occurred
B
happened
C
was happened
D
took place
The thief______ when he was stealing a wallet from a woman. 
#104328
A
happenedtonotice
B
wastakenplacetonotice
C
washappenedtobenoticed
D
happenedtobenoticed
. –Hi, Bob, don’t you know me? --Oh, it’s you. I _____you.
#103815
A
didn’t recognize
B
don’t recognize
C
haven’t recognize
D
won’t recognize