单项选择题

The passage is mainly about______.

A．a cheap way to get energy
B．the location of recycling plants
C．new ways of recycling wastes
D．the probably of city environment
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单项选择题
The new type of recycling plant will______.
A．recycle only paper and rubber
B．not recycle metals, paper or rubber
C．recycle paper, rubber and metals
D．not recycle steel, lead or copper
单项选择题
The purpose of the latest recycling project is______.
A．to prevent people from putting rubbish into holes
B．to find a way of destroying all kinds of waste
C．to extract useful raw materials from the waste
D．to find out how much raw materials could be provided
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