单选题The key problem in dealing with returned plastic beverage containers is _____.Ato sell them at a profitable priceBhow to turn them into useful thingsChow to reduce their recycling costsDto lower the prices for used materials
单选题
The key problem in dealing with returned plastic beverage containers is _____.
A
to sell them at a profitable price
B
how to turn them into useful things
C
how to reduce their recycling costs
D
to lower the prices for used materials
参考解析
解析：
细节推断题。第二段提到，直到现有的经济的废物处理方法给了它第二次生命的价值，即让它变成有用的东西，否则它就会一直是垃圾。这与B项意思相同，故B项正确。
细节推断题。第二段提到，直到现有的经济的废物处理方法给了它第二次生命的价值，即让它变成有用的东西，否则它就会一直是垃圾。这与B项意思相同，故B项正确。
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