问题补充:
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:
A. brought up
B. looked up
(答案→)C. picked up
D. set up
解析: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