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
词组辨析题。A. brought up 养育 B. looked up 查阅 C. picked up 学会 D. set up 设立 句意：塞姆通过看别人操作学会了许多电脑知识。 根据语境选C