单项选择题

A．Pick out all the glass and metal.
B．Get rid of dust.
C．Bum waste paper.
D．Screen earth and sand.
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单项选择题
A．Written by children themselves.B．Telling stories about the reader himself.C．Printed with standard things.D．Published with the help of computers.
A．Written by children themselves.
B．Telling stories about the reader himself.
C．Printed with standard things.
D．Published with the help of computers.
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