By talking with them I get to know Russian people see their country and the US.A. whatB.

问题补充：

By talking with them，I get to know Russian people see their country and the US.

A. what

B. when

C. why

D. how

答案：

A. what

B. when

C. why

(答案→)D. how

解析：在宾语从句中缺少方式状语，故用how引导。