I still remember my first teacher we haven’t seen each other for a long time.A. ifB. until

问题补充：

I still remember my first teacher we haven’t seen each other for a long time.

A. if

B. until

C. though

D. because

答案：

A. if

B. until

(答案→)C. though

D. because

解析：though引导让步状语从句。表示尽管…