The classroom        every day.
#44450
A
should clean
B
should be cleaned
C
should cleaned
D
should be cleaning
推荐题目
The new teaching building ________ before the new term begins.
#44681
A
must be finished
B
must finish
C
must finished
D
must being finished
I don’t think teenagers should       go to bars.
#44749
A
allow to
B
be allowed to
C
not allow to
D
be allowed
 —Smoking _________in the cinema. Please stop _________. —Sorry, I won’t.
#44571
A
is allowed; smoking
B
allows; to smoke
C
isn’t allowed; smoking
D
isn’t allowed; to smoke