---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
Can you guess if they ________ to play basketball with us ? I think they’ll come if they _______ free .
#44706
A
come, are
B
will come , will be
C
will come , are
D
come , will be
Today, computers are really helpful. They ____ everywhere.
#44613
A
use
B
are used
C
used
D
were used
Those people without children ________good care of by the government there.
#44844
A
are taking
B
are taken
C
have taken
D
were taking
English __________ by many people in the world.
#44455
A
use
B
uses
C
is used
D
used