---The window is dirty.----I know. It ______ for weeks.
#101155
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned
推荐题目
The bridge, which _____ 1688, needs repairing.
#103719
A
is dated from
B
was dated from
C
dates from
D
dated from
— ＿＿ Betty this morning? — Not yet, but she is sure to be here before noon.
#104402
A
Have you seen
B
Will you see
C
Do you see
D
Did you see
---- An ant has two stomachs --- one for itself and the other for others. ----Really? Quite interesting. I ________ anything about it.
#102385
A
don’t know
B
hadn’t known
C
haven’t known
D
didn’t know
Internet, as well as telephones, ____ an important part in daily communication.
#102462
A
is playing
B
have played
C
are playing
D
play
In order to find the missing boy, the young couple all they can over the past twenty-four hours.
#101189
A
do
B
did
C
have been doing
D
had done