题目内容
The air pollution of the city ____ by 20 percent thanks to the strict measures taken by the government.
A.has been fallen down | B.has been increased |
C.has been reduced | D.has been risen |
C
解析
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题目内容
The air pollution of the city ____ by 20 percent thanks to the strict measures taken by the government.
A.has been fallen down | B.has been increased |
C.has been reduced | D.has been risen |
C
解析