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       their final medical che

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       their final medical check, the astronauts boarded their spacecraft.
A.Received B.Being received C.To receive D.Having received
       their final medical che
D

考查非谓语动词作状语。the astronauts 与receive 之间是主动关系,所以用现在分词,又知receive的动作发生在boarded之前,所以用现在分词的完成式,句意:收到最终的医疗检查之后,宇航员们登上了他们的宇宙飞船。所以选D。