Every possible means ______ to prevent the air pollution, but the sky is still not clear.
#86302
A
is used
B
are used
C
has been used
D
have been used
推荐题目
Our football team _____ every match so far this year, but we still have three more games to play.
#85778
A
was winning
B
had won
C
has won
D
wins
One third of our school _________ covered by trees, while the majority of our students ________ girls.
#85627
A
is, is
B
are; are
C
is; are
D
are; is
No one in the department but Tom and I that the director is going to resign.
#85754
A
knows
B
know
C
have known
D
am to know