Every possible means ______ to prevent the air pollution, but the sky is still not clear.
#86302
A
is used
B
are used
C
has been used
D
have been used
推荐题目
Here is a message of importance to every man and woman who ____.
#86205
A
vote
B
votes
C
are voting
D
voted
The president , along with his bodyguards, _______ rushed away from the stadium.
#86021
A
is
B
was
C
were
D
are
Either you or one of your students___________ to attend the meeting that is due tomorrow.
#86081
A
is
B
are
C
have
D
be
A teacher and artist ______coming to speak to us about painting tomorrow afternoon.
#85672
A
is
B
are
C
was
D
were