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________evidence that language acquiring ability must be stimulated.

      A. If being    B. It is  C. There is  D. There being

C


解析:

句中有连词that和谓语must be stimulated,缺少一个谓语动词,排除A,D,该句译

成汉语是"有。。。的证据",而不是"它是。。。的证据"所以排除B.

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