52单词网 > 高中英语 > 高中英语题库 > As a recent survey states, people can hardly enjoy a clear blue sky because of t

As a recent survey states, people can hardly enjoy a clear blue sky because of t

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As a recent survey states, people can hardly enjoy a clear blue sky because of t

As a recent survey states, people can hardly enjoy a clear blue sky        because of the high level of PM 2.5.

A．in troubleB．on purposeC．as usualD．in ruins

试题答案

C

解析试题

标签：clearenjoyhardlybecausesky

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