Air pollution, together with littering, ____ many problems in our large industrial cities today.
#96011
A
causes
B
cause
C
caused
D
causing
推荐题目
Having answered the phone, I couldn’t but ______ what would happen next.
#96218
A
wondering
B
wondered
C
wonder
D
to wonder
Finding her car stolen, ______
#89913
A
a policeman was asked to help
B
the area was searched thoroughly
C
it was looked for everywhere
D
she hurried to a policeman for help
He opened the envelop, had it_____ and began to read it.
#96947
A
unfolding
B
folding
C
unfolded
D
folded
_______ many times , he still couldn’t understand it．
#94833
A
Told
B
Having been told
C
Having told
D
He had been told
.The typhoon(台风) left,___a lot of damage to the island where we live.
#97180
A
did
B
doing
C
to do
D
having done