Part Ⅳ  The Use of English

Directions:This part consists of a short passage.In this passage there are altogether 10 mistakes，one in each numbered line.You may have to change a word，add a word or delete a word.Mark the mistakes and put the corrections in the blanks provided.

It should not be taken for granted that recycling is more efficient than chucking something away.Compare all the costs，including collection，

landfill，disposal，pollution and the value of new materials is difficult. 71.____

And the signs are that recycling usually does make sense.A study by the 72.____

Technical University of Denmark looked at 55 products and compared the effects of buying，burning or recycling them.More(https://www.daowen.com)

than 80%of the time，the researchers found recycling was the more 73.____

efficient thing to do with household rubbish.Recycling aluminum

requires 95%less energy than making it at the beginning；the figure is 74.____

70%for plastics and 40%for paper.So what is the best way to get more people recycle more？The first step is to use new technologies that allow for a“single stream”of recyclable waste which is sorted on a conveyor belt use an arsenal of hands，“spinning disc”screens and sorting machines.People are more inclined to recycle things even if they do not have to sort them into different bins.75.____76.____77.____

The second step is to acknowledge that the best way of recycling waste may well be to sell them，often to emerging markets.What’s more，those who are prepared to buy waste are likely to make good use of it.78.____

The last step is to make people pay their non-recyclable waste and reward them for what they recycle.There are limits to this approach：you do not want people to put non-recyclable rubbish into the recycling bin just to earn credits.But a system that relies less on self-interest than on virtue should both increase recycling and decrease neighborly ill will.79.____80.____