单项选择题

-- Must I turn off the light when I leave
--No,______.

A．you mustn't
B．you can't
C．you needn't
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-- How far is it from here to your office-- About eight ______ walk.
A．minutes
B．minute
C．minutes'
单项选择题
Three of them have gone to the library. What about ______
A．the other
B．the others
C．others
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