题目内容
10、Every possible means _______to prevent the air pollution, but the sky is still not clear．
A．are being used B．have been used C．has been used D．had been used
试题答案
10、C
Every possible means ______ to prevent the air pollution, but the sky is still not clear.
A. is used B. are used C. has been used D. have been used
查看习题详情和答案>>Every possible means ______ to prevent the air pollution, but the sky is still not clear.
A. is used B. are used C. has been used D. have been used
查看习题详情和答案>>Every possible means ___ to prevent the air pollution, but the sky is still not clear．
| A．is used | B．are used | C．has been used | D．have been used |
Every possible means _____ to prevent the air pollution, but the sky is still not clear.
A. is used B. are used C. has been used D. have been used
查看习题详情和答案>>
Every possible means ___ to prevent the air pollution, but the sky is still not clear．
A．is used B．are used C．has been used D．have been used
查看习题详情和答案>>
Every possible means _______to prevent the air pollution, but the sky is still not clear.
A. are being used B. have been used C. has been used D. had been used
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Every possible means ________ to prevent the air pollution, but the sky is still not clear.
A. is used B. are used C. has been used D. have been used
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7、Every possible means ______ to prevent the air pollution, but the sky is still not clear.
|
A．is used |
B．are used |
C．has been used |
D．have been used |
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