—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
Don’t turn on the TV. Lucy has just come home from work and __________.
#38273
A
sleeps
B
is sleeping
C
was sleeping
D
slept
I don’t know if my uncle_______. If he______, I will be very happy.
#38498
A
comes; will come
B
will come; will come
C
comes; comes
D
will come; comes
-When _______ your mother _______ you that blue dress, Mary?-Sorry, I really can't remember.
#36452
A
does; buy
B
has; bought
C
had; bought
D
did; buy
-Have you visited New York?-Yes, I have. I __________ there twice.
#36758
A
have gone
B
will go
C
have been
D
went