All possible means ____ to prevent the air pollution, but the sky is still not clear.
#100326
A
is used
B
has been used
C
are use
D
have been used
推荐题目
I can guess you were in a hurry. You your sweater inside out .
#103993
A
had worn
B
are wearing
C
were having on
D
were dressing
The young man，who by then ___ admission to university，decided to do some part-time jobs to gain more practical experience．
#100177
A
gained
B
was gaining
C
has gained
D
had gained
I don’t think she noticed the headmaster just at that moment, for she _______ the game on her cellphone.
#100902
A
played
B
was playing
C
is playing
D
has been playing
–What did you say? --So you _____________ to me.
#102117
A
won’t listen
B
didn’t listen
C
haven’t listened
D
weren’t listening
As high school students, it’s very important to keep ourselves ______ of what’s happening home and abroad every day.
#103371
A
to inform
B
informing
C
informed
D
be informed