（ ）the project,they have to stay there for another two weeks.A.not completingB.not completed
C.not having completedD.having not completed 求详解
人气：398 ℃ 时间：2019-09-22 02:54:51
解答
C 从过去到现在在到将来 用完成时态 而他的否定时态则在前面加否定词not
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