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：考查不定式做目的状语。当问及为什么去那时他说他被派往那为的是训练太空飞行。He与train为动宾关系所以用不定式的被动式，答案为D。