【題目】That was the fourth time that Mr. Smith __________the Summer Palace.

A. has visited B. visits

C. had visited D. to visit

【答案】C

【解析】考查過去完成時(shí)。句意為“這已經(jīng)是史密斯先生第四次參觀頤和園了。主句時(shí)態(tài)為一般過去時(shí)，從句時(shí)態(tài)應(yīng)該用過去完成時(shí)，若主句時(shí)態(tài)為一般現(xiàn)在時(shí)，則從句應(yīng)用現(xiàn)在完成時(shí)。故選C。

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