Reading is one kind of（ ）.But practing is also （ ）and more important than （ ）

题目

Reading is one kind of（ ）.But practing is also （ ）and more important than （ ）
A.to learn：learning：reading
B.learning：to learn：to read
C.learning：learning：reading
D.to learn：to learn：to read
要写明语法原因

答案