Question

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

Answer 1

C

考查固定短语。brought up抚养长大；．looked up查找，检查；picked up拾起，捡起，偶然学会；set up设立，建立。Sam通过看别人操作学会了一些电脑知识。所以选C。