单项选择题

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

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I have a lot of readings （） before the end of this term.

A. completing
B. to complete
C. completed
D. being completed
单项选择题
I（）have watched that movie--it'll give me horrible dreams.

A. shouldn' t
B. needn' t
C. couldn't
D. mustn't
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