A good memory is a great help in ( )a language括号里应该填哪个?求理由A.learn B.learning C.learns D.being learning还有,learn a language和learning a language有什么区别?求讲解

问题描述:

A good memory is a great help in ( )a language括号里应该填哪个?求理由
A.learn B.learning C.learns D.being learning
还有,learn a language和learning a language有什么区别?求讲解