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
There _____ an American film “Titanic” in the cinema next Sunday.
#43915
A
puts on
B
will have
C
is going to be
D
is going to have
When and where we shall bulid a larger home for the aged ________ to be discussed by the local government.
#85722
A
remains
B
remain
C
is remained
D
are remaining
A survey of the opinions of experts___that three hours of outdoor exercise a week___good for one’s health.
#86099
A
show;are
B
shows;is
C
show;is
D
shows;are
We live day by day, but in the great things, the time of days and weeks ____ so small that a day is unimportant.
#85914
A
is
B
are
C
has been
D
have been