It was ten years he returned to his hometown and set out to revenge his dead father.A. si

问题补充：

It was ten years he returned to his hometown and set out to revenge his dead father.

A. since

B. that

Cbefore

Dwhen

答案：

A. since

B. that

(答案→)C. before

D. when

解析：考查连词。since 自从……以来； that因为，以至于；before在……之前；when当……时。句意：在他返回家乡为他的父亲报仇之前以后十年的时间了。故选C。