No one in the department but Tom and I __________ that the director is going to resign.A.knows B.know C.have known D.am to know

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No one in the department but Tom and I __________ that the director is going to resign.
A.knows B.know C.have known D.am to know

答案A 该题考查主谓一致和动词时态.but表示“除了”是是介词,空白前为主语部分,主语中心词是No one,谓语动词要用第三人称单数,排除B、C.A项表示的是一般情况,D项表示的是按计划或安排将要发生的动作.主句谓语动词的动作属于前者,须用一般现在时态,应在know后加-s,答案为A.查看原帖>>