—What a nice classroom! —It _____ every day.
#44598
A
is cleaning
B
has cleaned
C
must clean
D
is cleaned
推荐题目
The light bulb ______ by Edison in the middle of the 1780s.
#44649
A
is invented
B
was invented
C
invented
D
invent
I’m glad to find that many trees ________ in our city last year.
#44989
A
plant
B
planted
C
were planted
D
are planted
People who drink wine______ to drive.
#44582
A
don’t allow
B
isn’t allowed
C
shouldn’t allow
D
mustn’t be allowed
---It’s difficult for the villagers to cross the river. ---I think a bridge______ over the river.
#44765
A
should be built
B
is being built
C
has been built
D
was built
The prices of new houses in our city have been _____than before, but they ______ well at present．
#44834
A
lower, don’t sell
B
lower, are not still sold
C
higher, don’t sell
D
cheaper, are not still sold