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Sam _____ some knowledge of the computer...

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

 

C 【解析】考察词组。Bring up 抚养 ,养育 look up查找 pick up偶然学到,捡起,接某人 ,接收信号 set up建立 句意为,sam在看别人用电脑的时候偶然学到了一些电脑知识。
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