2. 外语
  3. DEALING WITH WASTE PLASTIC Every year people throw away millions of tonnes of plastic bottles, boxes and wrapping. These cr

DEALING WITH WASTE PLASTIC Every year people throw away millions of tonnes of plastic bottles, boxes and wrapping. These cr

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问题                             DEALING WITH WASTE PLASTIC
   Every year people throw  away  millions of tonnes of plastic bottles, boxes and wrapping. These create huge mountains of waste 【C1】______ are extremely hard to get 【C2】______ of. Now, a new recycling process promises to reduce this problem by turning old plastic 【C3】______ new.
   Scientists have taken 【C4】______ long time to develop their ideas because waste plastic has always been a bigger problem 【C5】______ substances like waste paper. You can bury plastic, but it is years 【C6】______ it breaks down. If you burn it, it just becomes another form of pollution. A 【C7】______ products, for example bottles, can be re-used but it is expensive or difficult to do this 【C8】______ a lot of plastic products.
   Now a group of companies has developed a new method 【C9】______ recycling that could save almost 【C10】______ plastic waste. The advantage of the new process is that nearly every type of waste plastic can be used: it does 【C11】______ have to be sorted. In addition, labels and ink may be left 【C12】______ the products. Everything is simply mixed together 【C13】______ heated to more than 400 degrees centigrade 【C14】______ that it melts. It is then cooled, producing a waxy substance that can be used to make new plastic products such as bags, bottles and, among 【C15】______ things, computer hardware.
【C1】______
选项
答案which/that
解析 这里which或that引导定语从句。
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