It’s a long time ago I saw you last time.A. whenB. sinceC. forD. that

问题补充：

It’s a long time ago I saw you last time.

A. when

B. since

C. for

D. that

答案：

A. when

(答案→)B. since

C. for

D. that

解析：句意：自从我上次见你是很久之前了。since表示自从，构成固定句型：It is +一段时间+since+从句，表示自从…已经很长时间了，故选B