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isknowntoallisthateffectivemeasuresshouldbetakentodealwiththeproblemoftheover-exploitingofourresources.A.WhatB.ItC.AsD.Which

题目详情
_____ is known to all is that effective measures should be taken to deal with the problem of the over-exploiting of our resources.
A.What B.It C.As D.Which
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答案和解析
A