Astronauts are（ ）all kinds of tests before they are sent to a spacecraft.
A、
subjected to
B、
related to
C、
opposed to
D、
devoted to
【正确答案】：A
【题目解析】：
本题考查常见动词、形容词短语的含义辨析。
subject sb to sth：使某人经受某事，relate…to…：将…和…联系起来，be opposed to sth：反对某事，be devoted to sth：热衷/致力于某事，分析语境，宇航员在他们被送上太空船之前…各种测试。此处含义应为“经受”，句中为被动语态形式，故选A。
句意：宇航员在被送上太空船之前要接受各种各样的测试。