Some people thought possible to live on out space in the future .A. itB. it beC. it isD.

问题补充：

Some people thought possible to live on out space in the future .

A. it

B. it be

C. it is

D. that is

答案：

(答案→)A. it

B. it be

C. it is

D. that is

解析：考查代词。句中it作形式宾语，真正的宾语为不定式to live on out space in the future。句意：一些人认为将来生活在外太空是有可能的。