The best way your English is to join an English club.A. to improveB. improveC. improvingD

问题补充：

The best way your English is to join an English club.

A. to improve

B. improve

C. improving

D. improves

答案：

(答案→)A. to improve

B. improve

C. improving

D. improves

解析：句意：加入英语俱乐部是提高英语最好的方法。the best way to do sth 做某事最好的方法，属于固定句型，故选A