Accordingtoanewstudybyscientists,learning     secondlan...

问题详情：

According to a new study by scientists, learning      second language can lead to        

    increase in a person's brain power.

    A．a; 不填          B．the; an      C．a; an    D．the; 不填

【回答】

C

知识点：冠词

题型：选择题