---Why is the classroom so dirty? --- Sorry, sir. It ______ yesterday. We forgot to do it. 
#44831
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
推荐题目
—I usually watch TV till 11 o’clock in the evening.—Really ? Are you __________?
#44891
A
allowed to stay up
B
allow to stay up
C
allowing staying up
D
allowed stay up
The words that we should pay attention to ________on the blackboard.
#44787
A
being written
B
are written
C
is writing
D
writing
You _________ such clothes because you are still a student.
#44637
A
aren’t allowed to wearing
B
aren’t allowed to wear
C
aren’t allowed wearing
D
don’t allow to wear