1. — Have you known each other for long? — Not very long we started to work in the compa

问题补充：

1. — Have you known each other for long?

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

A. after

B. before

C. when

Dsince

答案：

A. after

B. before

C. when

D. since

解析：还原过后应为： We have known each other since we started to work in the company.