_________ their final medical check, the astronauts boarded

_________ their final medical check, the astronauts boarded their spacecraft.
A.Received B.Being received C.To receive D.Having received
心流血 1年前 已收到1个回答 举报

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D

考查非谓语动词。接受体格检查再等上航天飞机之前,且主语与动作之间是主动关系,故需要用现在分词的完成式。

1年前

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