2. 外语
  3. Astronauts are ______ all kinds of tests before they are actually sent up in a spacecraft.

Astronauts are ______ all kinds of tests before they are actually sent up in a spacecraft.

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问题 Astronauts are ______ all kinds of tests before they are actually sent up in a spacecraft.
选项 A、inclined to
B、subjected to
C、prone to
D、bound to
答案B
解析 (be) subjected to sth．(协为介词)遭受(痛苦)，经受某种经历，蒙受…；be inclined to do sth．易于做某事的，有做某事的倾向的：be inclined to get tired easily很容易疲倦；be prone to易于发生(不愉快事)的，有发生(不愉快的事的)倾向的；be bound to必定要做某事的：be bound to succeed必定要成功。句意：在正式飞上太空之前，宇航员要经过各种测试。
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