The best way English is doing more practice.A. learn B. learning C. to learnD. learns

问题补充：

The best way English is doing more practice.

A. learn

B. learning

C. to learn

D. learns

答案：

A. learn

B. learning

(答案→)C. to learn

D. learns

解析：最好的学习英语的方法是多做练习。不定式作定语表示具体的将要进行的动作，结合语境可知选C。