单项选择题

The key problem in dealing with returned plastic beverage containers is______.

A．to sell them at a profitable price
B．how to mm them into useful things
C．how to reduce their recycling costs
D．to lower the prices for used materials

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热门试题

单项选择题

The returned plastic bottles in New York used to______.

A．end up somewhere underground
B．be turned into raw materials
C．have a second life value
D．be separated from other rubbish

单项选择题

It is commonly accepted in American society that too much sleep is______.

A．unreasonable
B．criminal
C．harmful
D．costly