单项选择题

A．Important Keys to Recycling Paper.
B．Technological Advances Improve Recycling.
C．Steps to Improve Recycling.
D．A Greater Demand for Improving Recycling.
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单项选择题
A．They are not well educated.B．They failed to work hard at school.C．The society is too complicated.D．What they learned in the school ii not adequate for their new life.
A．They are not well educated.
B．They failed to work hard at school.
C．The society is too complicated.
D．What they learned in the school ii not adequate for their new life.
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