2018--2019学年人教版选修七unit 2 robots using language课时作业(7)
2018--2019学年人教版选修七unit 2 robots using language课时作业(7)第2页

  A.was reading B.had read C.would read D.will read

9. -What do you think of Steven Hawking?

-Well, despite his disabled body, he was a man of scientific nature,     worthy of admiration.

  A.one B.who C.that D.this

10. Try to     to each person all your kindness and understanding and the world will be a better place to live in.

  A.appeal B.cater C.extend D.attach

二、阅读理解

  In the United States alone, over 100 million cell-phones are thrown away each year. Cell-phones are part of a growing mountain of electronic waste like computers and personal digital assistants. The electronic waste stream is increasing three times faster than traditional garbage as a whole.

  Electronic devices contain valuable metals such as gold and silver. A Swiss study reported that while the weight of electronic goods represented by precious metals was relatively small in comparison to total waste, the concentration(含量)of gold and other precious metals was higher in so-called e-waste than in naturally occurring minerals.

  Electronic wastes also contain many poisonous metals. Even when the machines are recycled and the harmful metals removed, the recycling process often is carried out in poor countries, in practically uncontrolled ways which allow many poisonous substances to escape into the environment.

  Creating products out of raw materials creates much more waste material, up to 100 times more, than the material contained in the finished products. Consider again the cell-phone, and imagine the mines that produced those metals, the factories needed to make the box and packaging (包装)it came in. Many wastes produced in the producing process are harmful as well.

The U.S. Environmental Protection Agency notes that most waste is dangerous in that " the production, distribution, and use of products-as well as management of the resulting waste-all result in greenhouse gas release."Individuals can reduce their contribution by creating less waste at the start-for instance, buying reusable products and recycling.