作业帮 > 英语 > 作业

_________ their final medical check, the astronauts boarded

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/08 21:08:34
_________ their final medical check, the astronauts boarded their spacecraft.
A.Received B.Being received C.To receive D.Having received
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。