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
—When did you move to Qionghai?—In 2009.But I ________in Haikou for many years.
#99415
A
have worked
B
would work
C
have been working
D
worked
-- Daniel，why are you so late? We_______ you would be here an hour ago.--- Sorry. I _______ know you were all here.
#101249
A
expect；don’t
B
expected；don’t
C
expected；didn’t
D
expect；didn’t
Mr. Lin ______ when I go to see him on Sundays.
#101757
A
is always working
B
was always working
C
always worked
D
has always worked
The painting ______ to someone who later donated it to the college.
#99333
A
had sold
B
was sold
C
will sell
D
is sold