【題目】So far, the moon ________ by man already.
A.is visited
B.will be visited
C.has been visited
D.was visited

【答案】C
【解析】句意：到目前為止，月球已經(jīng)被人拜訪過。so far到目前為止，通常用現(xiàn)在完成時，moon與visit之間構(gòu)成被動關(guān)系，故用現(xiàn)在完成時的被動語態(tài)：have/has been+過去分詞。因此答案是C。

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