When asked why he went there, he said he was sent there for a space flight.
A. training
B. being trained
C. to have trained
D. to be trained
网友回答
A. training
B. being trained
C. to have trained
(答案→)D. to be trained
解析：
这题考查不定式做目的状语的用法：句意是：当被问及为什么到那里，他说被送到那里是为了受训进行太空飞行。选D。