Every possible means _____ to prevent the air pollution, but the sky is still not clear.
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A
is used
B
are used
C
has been used
D
have been used
推荐题目
Mary is one of the brightest students who_________ from New York University.
#86278
A
is graduated
B
have graduated
C
has graduated
D
are graduated
Mary three of her classmates invited to the party.
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A
as well; has been
B
and; have
C
as well as；was
D
as good as; were
The teacher as well as the students who_____fond of football,_____ playing together.
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A
are; is
B
are; are
C
is; are
D
is; is
The factory used 65 percent of the raw materials, the rest of which _____ saved for the other purpose.
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A
is
B
are
C
was
D
were