Every possible means ________ to prevent the air pollution，but the sky is still not very clear.
#85546
A
were using
B
have used
C
has been used
D
was used
推荐题目
The woman always says a bad word about others. her workmates her child dislikes to make friends with her.
#44281
A
Either; or
B
Neither; nor
C
Both; and
D
Not only; but also
All of my teachers but the math teacher ______ he cheated in the exam.
#85742
A
doubt that
B
doubts that
C
doubt whether
D
doubts whether
It’s wrong _____ you _______ the disabled people.
#43495
A
for; to laugh
B
of ; to laugh
C
of ; to laugh at
D
for; to laugh at
Not only I but also Jane and Mary ______tried of having one examination after another.
#85648
A
am
B
be
C
are
D
is