——Why is the classroom so dirty?——Sorry, Sir. It _____ yesterday. We forgot to do it.
#41937
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
推荐题目
He has a hard time          the problem.
#42186
A
works out
B
working out
C
work out
D
works out
He _____ a song last night.
#41614
A
writes
B
writing
C
wrote
D
writed
I will _______ him when I _______free.
#41766
A
call, am  
B
call to, am
C
call, will be 
D
call to, will be
—I called you last night, but no one answered me.—Oh, I________ a shower.
#36468
A
have taken
B
was taking
C
took
D
will take