He________fullmarks,buthewassoca

发布时间：2020-07-10 00:35:37

He ________ full marks, but he was so careless to make a spelling mistake.













A.must have gained












B.can have gained











C.could have gained











D.must gain

网友回答

C解析解析：could have gained指“本来能获得，但事实上没有”。
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