单项选择题

A．The number of families studied was too small.
B．All the factors were considered.
C．Divorce is not painful.
D．Healthy families do not have problems.
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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.
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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