问题
选择题
Sam ______ some knowledge of the computer just by watching others working on it.
A．brought up
B．looked up
C．picked up
D．set up
答案
答案：C
考查短语辨析。bring up 培养，look up 查字典，pick up 捡起，接某人，偶然学到，set up建立。句意：Sam偶然学会了一些电脑知识仅仅看别人从事电脑工作。故选C。