—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
What do you do when it _____? --- I often stay at home and read books.
#40532
A
raining
B
rain
C
rains
D
is rains