Question

    Scientists in Britain and the United States have made a new kind of enzyme(酵素)that eats plastics. With its help, plastics can be turned into smaller parts and go away quickly. Scientists believe that, in the future, it could solve the problem of plastic pollution.

The enzyme is able to break down PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can remain in the environment for many years and pollute large areas of land and water. So it has always been a headache to deal with the waste from PET and other plastics.

The researchers made the discovery while examining the structure of a natural enzyme in Japan. They found that the natural enzyme was helping to break down PET plastics. So, they decided to make small changes to the enzyme by adding some amino acids(氨基酸). It made the natural enzyme's plastic­eating abilities work faster and better.

John McGeehan, one of the lead researchers, said, “We've made an improved enzyme. It's better than the natural one. And we are trying to make more improvements to it.” He went on, “The enzyme is not harmful to humans or animals, and it is friendly to the environment. So we are considering putting it into wider use.”

The team is now trying to make the enzyme break down PET in large quantities(大量地). “We'll_see_that_the_plastic_pollution_may_be_stopped_with_this_technology__However, there is still a long way to go，” John McGeehan added.

1.完成句子：

With the help of this new enzyme, plastics can be________________ smaller parts and go away quickly.

2.完成句子：

PET can pollute large areas of ________________.

3.简略回答问题： What did the researchers find according to the passage?

____________________________________________

4.找出并写下文章的主题句：

____________________________________________

5.将文中画线句子译成汉语：

____________________________________________

Answer

1.turned into

2.land and water

3.The natural enzyme was helping to break down PET plastics.

4.Scientists in Britain and the United States have made a new kind of enzyme that eats plastics.

5.我们将会见证塑料污染或许会在这种技术的帮助下被阻止。

【解析】

主旨大意：本文是一篇说明文。文章介绍了英国和美国的科学家已经研制出一种新型的酵素，这种酵素有助于分解塑料，利用这项技术或许可以解决塑料污染的问题。