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【单选题】
It is essential that we _______ measures to protect the ozone layer.
A.will take
B.should take
C.would take
D.took
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根据网考网移动考试中心的统计,该试题:
10%
的考友选择了A选项
87%
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1%
的考友选择了C选项
2%
的考友选择了D选项
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