-do you learn English so well?--I learn using it.A. What; byB. Where; atC. Why in

问题补充：

---- do you learn English so well?

----I learn using it.

A. What; by

B. Where; at

C. Why, in

D. How， by

答案：

A. What; by

B. Where; at

C. Why, in

(答案→)D. How， by

解析：

试题分析: 句意：你怎么把英语学的那么好？我通过用英语学习英语。What什么，by通过； Where在哪儿， at在；Why为什么, in用；How怎样，by通过。根据语境可知选D