_________ their final medical check, the astronauts boarded their spacecraft. A
题型：不详难度：来源：
_________ their final medical check, the astronauts boarded their spacecraft. | A．Received | B．Being received | C．To receive | D．Having received |
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答案
| D |
解析
| 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。 |
举一反三
Charlie Chaplin is considered ________ a great contribution to the film industry.| A．to make | B．making | C．to have made | D．having made |
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A to see B to seeing C to being seen D to be seen |
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