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 teacher as well as her students _____ to visit the Moter Company tomorrow.
#86079
A
go
B
are to go
C
is to go
D
is about to go.
When the injured to the hospital , they came to .
#86274
A
was rushed , life
B
were rushed , life
C
rushed , lives
D
were rushed , lives
Both of you claim you are right.In fact，either you or he ________ wrong.
#85592
A
are
B
is
C
were
D
was