－Haveyoubeenacquaintedwitheachotherforlong?－Notverylong...

问题详情：

－Have you been acquainted with each other for long?

－Not very long, ____________ we started to work in the company.

A. after             B. before           C. when                 D. since

【回答】

D

知识点：连词

题型：选择题