单项选择题

Oh, boy, why are you killing your time this way
Can't you find something ______ doing at all

A．useful
B．valuable
C．worth
D．good
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单项选择题
We must think of the ______ of the disabled when we organize an activity
A．worries
B．needs
C．dreams
D．number
单项选择题
--Tom, you make bed before breakfast,______.--All right, mum.
A．don't you
B．doesn't he
C．will you
D．do you
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