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
The truck ran down the hill, and the driver _____, according to the local newspaper, to have been killed.
#101207
A
was reported
B
was reporting
C
reported
D
had been reported
I got caught in the rain and my suit______.
#102751
A
has ruined
B
had ruined
C
has been ruined
D
had been ruined
Amy insists that she ____ the secret to lose weight. But she won’t share it with us.
#101092
A
had discovered
B
discovers
C
has discovered
D
will discover
John went to the hospital alone. If he me about it, I would have gone with him.
#102973
A
tells
B
told
C
should tell
D
had told
Look, the little girl is dancing as if she ______ a little bird.
#103195
A
is
B
were
C
has been
D
had been