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.
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.
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