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，一个人就会偶然学到他们的语言。故选C。