Every possible means _______ to prevent the crash , but the computer doesn’t still work.
#4644
A
is used
B
are used
C
has been used
D
have been used
推荐题目
  —I think everyone has a role to play in making the planet a better place.—Yes, indeed. ______.
#4622
A
I’m with you on that
B
That couldn’t be better
C
You have got something
D
I’ll do my best
John and Mary’s room _______ on fire. Many _______ help them put out the fire.
#4682
A
are; passer-bys
B
is; passers-by
C
is; passer-bys
D
are; passers-by
Was it in the village_______we used to live in_______the accident happened? 
#4955
A
where; that
B
which; that
C
that; where
D
where; which