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
_____ of the students in our class _____ girls.
#43767
A
Three fives; is
B
Three fifths; is
C
Three fifth; are
D
Three fifths; are
This is one of the happiest days ____ spent in my life.
#85594
A
that have ever been
B
that has never been
C
which was ever
D
that had been
Professor Smith, along with his assistant, ________on the project day and night to meet the deadline.
#85952
A
work
B
working
C
is working
D
are working
It’s said that there _____ a football match on TV this evening.
#43977
A
will have
B
is going to be
C
has
D
is going to have