A) end up somewhere underground
B) be turned into raw materials
C) have a second-life value
D) be separated from other rubbish
38.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
39.Recycling ahs become the first choice for the disposal of rubbish because ________.
A) local governments find it easy to manage
B) recycling ahs great appeal for the jobless
C) recycling causes little pollution
D) other methods are more expensive
40.It can be concluded from the passage that ________.
A) rubbish is a potential remedy for the shortage of raw materials
B) local governments in the U. S. can expect big profits from recycling
C) recycling is to be recommended both economically and environmentally
D) landfills will still be widely used for waste disposal
答案：36.C 37.D 38.C 39.B 40.A