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Some astronauts to the space station and they haven’t returned yet.

A. have gone B. has gone

C. have been D. has been

A 【解析】句意:一些宇航员已经去太空站了,他们还没有回来。根据语境可知,本句表示过去的动作对现在造成的影响或结果, 所以使用现在完成时态,has/have+动词的过去分词。have /has been to意为“去过某地”,人已不在那里(某地);have /has gone to意为“去了某地”,人不在说话地点。some astronauts在句中作主语,复数含义,所以借助助动词have。...
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