. — Did Peter fix the computer himself?— He because he doesn’t know much about computers

问题补充：

. — Did Peter fix the computer himself?

— He , because he doesn’t know much about computers.

A. has it fixed

B. had fixed it

C. had it fixed

D. fixed it

答案：

A. has it fixed

B. had fixed it

(答案→)C. had it fixed

D. fixed it

解析：

C。根据对话的最后一句话可知“他对电脑了解不多”，所以他需要请人修理，故用“have+宾语+过去分词”结构，即选C。