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Recently.the scientists___in *.A.discovered B.ciscover C.have discoverde D.has discovered

分类: 作业答案 • 2022-01-09 18:00:39

问题描述：

Recently.the scientists___in *.A.discovered B.ciscover C.have discoverde D.has discovered

答

怎么感觉没对的.应该是have been discovered吧?