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

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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

解析根据句子中的It’s time可以推断这是一个由It’s time引导的虚拟语气句型；“采取有效措施”take effective measures。根据句子结构可以推断这里应当用被动语态，即some effective measures were taken。

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[originaltext]IntheUnitedStates,thesocialproblempresentedbyhealth