—Why is the classroom so dirty?—Sorry,sir. It yesterday, We forgot to do it.
#39874
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
推荐题目
Do you know when the basketball_________?
#37140
A
is invented
B
was invented
C
has invented
D
had invented
--____ you ____the work?--No, we need two more hours.
#40403
A
Have , finished
B
Do, finish
C
Did, finish
D
Will, finish