题目

Would you mind ______ me who is going to make the opening speech at the ceremony?A.tell B.tells C.to tell D.telling 答案：【答案】D【解析】句意：你告诉我谁将在典礼上作开幕词，好吗？考查动名词做宾语。句型“Would you mind doing sth.?”：你介意做某事吗？/你做某事，好吗？mind：介意，及物动词，后面跟动词的ing形式。故选D。设x∈R，则“x＞”是“2x2+x-1＞0”的（ ）A．充分而不必要条件B．必要而不充分条件C．充分必要条件D．既不充分也不必要条件