"IwanttogotoMars(火星),becauseit'saplacethatnoone
问题详情:
"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
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问题详情:打秋千时,为使秋千越荡越高,人应有一个从直立到蹲下,又从蹲下到站直的过程.则打秋千时 A.人的机械能是守恒的 B.人应在最低点站起来 C.人应在最高点站起来 D.人在最低点时失重【回答】C知识点:未分类题型:选择题...
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