2. 外语
  3. It’s time______(采取一些有效措施)about the pollution problem all over the country.

It’s time______(采取一些有效措施)about the pollution problem all over the country.

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问题 It’s time______(采取一些有效措施)about the pollution problem all over the country.
选项
答案some effective measures were taken
解析
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大学英语四级

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