It is five years he lived here.In other words he left here five years ago.A. beforeB. si

问题补充：

It is five years he lived here.In other words, he left here five years ago.

A. before

B. since

C. that

D. when

答案：

A. before

(答案→)B. since

C. that

D. when

解析：“It is/was +一段时间+since从句”为一常用句型。