When asked why he went there he said he was sent there for a space flight.A. trainingB. b

问题补充：

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

答案：

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。