It takes me about a day to learn the rules.__if you want to be good ,you have to pratice for years.

题目

It takes me about a day to learn the rules.__if you want to be good ,you have to pratice for years.
A、and B、so C、yet D、but
选择什么

答案

D.前面说学习这些规则很不容易.后面转到另一个意思,练习是成功的必要.所以用But