题干
We will do what we can ________ help them practice ______ English.
A：/, to learn
B：to, to learn
C：to, learning
D：/, learning
答案(点此获取答案解析）
C
We will do what we can ________ help them practice ______ English.
A：/, to learn
B：to, to learn
C：to, learning
D：/, learning
