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

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：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。