问题补充:
By making friends with the native speakers, one can a lot of their language.
A. take up
B. set up
C. pick up
D. put up
答案:
A. take up
B. set up
(答案→)C. pick up
D. put up
解析:考查短语辨析。take up 从事,set up 建立,pick up 捡起,偶然学到,put up
搭起。句意:通过和本地人交朋友,一个人可能会偶然学到他们的语言。故选C。