Before they are actually sent up in a spacecraft，______(宇航员需经受各种各样的测试)．astronaut

游客2023-08-31 57

问题 Before they are actually sent up in a spacecraft，______(宇航员需经受各种各样的测试)．

选项

答案 astronauts are subjected to all kinds of tests

解析考查固定搭配be subjected to。subject意为“使经受，使遭受”，是被动形式，to后跟名词。

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