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"IwanttogotoMars(火星),becauseit'saplacethatnoone

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问题详情:

"IwanttogotoMars(火星),becauseit'saplacethatnoone

"I want to go to Mars (火星),because it's a place that no one______to before,"said Carson.

A.has gone   B.has been   C.was     D.went

【回答】

B

知识点:动词时态

题型:选择题