题目内容：

the best way is improve your English is to join an English club.(急!）
句型转换
The best way is improve your English is to join an English club.（改为同义句）
Joining an English club ___ ___ ___ ___ to improve your English.

优质解答

主语宾语倒置
所以填 is the best way
在原句里：The best way 是主语 to join an English club是宾语