The best way to prevent the air polluting _____ , but the sky is still not clear.
#102116
A
is used
B
are used
C
has been used
D
have been used
推荐题目
Nothing that he suggested _____ to be of any use.
#100775
A
prove
B
proved
C
proving
D
has been proved
The subway __________in our city, and I’m sure there will be fewer traffic jams in the future.
#102273
A
is building
B
is built
C
is being built
D
will build
—May I speak to your manager at 4：00 this afternoon? —Sorry, sir. He ________ to a meeting soon.
#99378
A
would go
B
has gone
C
will have gone
D
is going
— Ann is in hospital.— Oh, really? I _____________ know. I _______________ go and visit her.
#103134
A
didn’t; will
B
don’t; will
C
don’t; would
D
didn’t; am going to
–Why, David, you look so tired! –Well, I ______ a report for the whole day and I must finish it tomorrow.
#101962
A
was writing
B
will be writing
C
have written
D
have been writing