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

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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
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

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
选B.在某一个方面有帮助,in后面应该加动名词,而D中的be有将要发生的含义,此句更多的是在阐述一个常识,现在时就够了.

选B,因为in是介词,介词后面只能加doing形式。而learn是动词,不能直接加的。

B选项。介词后跟分词ing形式。