问题补充:
— 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
答案:
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.