Every possible means ______ to prevent the air pollution, but the sky is still not clear.
#85598
A
has been used
B
have been used
C
is used
D
are used
推荐题目
Since I have read quite a few English books, I know ______words and phrases, of which the majority______ been found in our textbook.
#85872
A
a good many; haven’t
B
a great deal of; haven’t
C
the number of; hasn’t
D
a number of; hasn’t
Still many Senior Three students haven't realized reading English newspapers _______of great help to their English study.
#85608
A
is
B
are
C
have been
D
had heen
The number of college students in Jiangsu this year _______ more than 500,000. But a number of students ________ attend good colleges now.
#43729
A
are; don’t
B
are; aren’t
C
is; aren’t
D
is; don’t