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Sam will make more progress if he__________harder.A.will work B.was working C.works D.worked

分类: 作业答案 • 2021-12-19 20:00:09

问题描述：

Sam will make more progress if he__________harder.A.will work B.was working C.works D.worked

答

主句用一般将来时,从句就用一般现在时,所以选C