Question

we should do what we can _______ English A.to practice to speak B.to practice speaking

A.to practice to speak B.to practice speaking C. practice speaking D.A. practice to speak
解释一下

Answer 1

B， 前面的用于to 用于连接 do to do 的动词。 what we can 用于修饰do, 也可以简单替换为something, do something to practice. 然后practice 接动词的ing形式。

供参考。