问题补充：
---Could you tell me my English?
---By listening and speaking more.
A. what to improve
B. where to improve
C. how to improve
D. which to improve
答案：
A. what to improve
B. where to improve
(答案→)C. how to improve
D. which to improve
解析：句意：你能告诉我怎样提高我的英语呢？通过多听和多说。how to do sth如何做某事， how to improve意为如何提高，故选C.
