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
网友回答
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。