— Helen, your English is pretty good. How can I improve my English?
—I think you can improve your English reading more.
A. at
B. by
C. on
D. for
网友回答
A. at
(答案→)B. by
C. on
D. for
解析：by+doing sth通过做某事，固定结构；句意：海伦，你的英语这么好，我能如何来提高我的英语？我认为你能够通过多阅读来提高它。故选B.