____ do you improve your listening?i improve my listening _ watching English movies.

题目

____ do you improve your listening?i improve my listening _ watching English movies.
A.What;by B.How;by C.Where;on D.When;on

答案

B
翻译：你怎样提高听力?
我通过看英文电影提高听力.
How 怎样
by 通过