—What a nice classroom! —It _____ every day.
#44598
A
is cleaning
B
has cleaned
C
must clean
D
is cleaned
推荐题目
---Did you go to Jim’s birthday party？ ----No, I .
#44949
A
haven’t invited
B
didn’t invite
C
am not invited
D
wasn’t invited
—Oh, this is really an old building.—Do you know when it ?
#44645
A
has built
B
is built
C
was built
D
will be built
Food safety is important. Rules _____ to stop people from food pollution.
#44569
A
must make
B
must be made
C
mustn’t make
D
mustn’t be made
—It’s difficult to get to the other side of the river.—I think a bridge over the river.
#44615
A
should be built
B
should build
C
will build
D
has built