单项选择题

A．Government regulation of waste.
B．Better technology.
C．More demand for recycled materials.
D．More public awareness about the recycling process.
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单项选择题
A．Learn from a Model.B．Learn, Learn and Learn Again.C．Learn Forever.D．One Is Never Too Old to Learn.
A．Learn from a Model.
B．Learn, Learn and Learn Again.
C．Learn Forever.
D．One Is Never Too Old to Learn.
单项选择题
A．Copy paper.B．Document piece.C．Food wrappers.D．Newspapers.
A．Copy paper.
B．Document piece.
C．Food wrappers.
D．Newspapers.
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