单项选择题

22（）

A．At
B．In
C．On
D．For

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单项选择题
21（）

A．both
B．any
C．either
D．neither
单项选择题
The passage implies that one of the most important factors for Keith Peiris’ success is ______.
A．a good family education
B．the invention of the computer
C．the great help from the school
D．the advantage of his age
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