题目内容

As we are growing up, we really need advice from adults. Here are three people talking about their experiences.

Jasper,26, actor

You’re not alone.

Sometimes when you’re a teenager, you feel as if you’re all alone and there’s 1. you can talk to. Do you know twenty to thirty percent of teenagers in the US have a hard 2. going through the period? They feel lonely and sad. I think life is so much easier if you 3. your troubles with others. I regret that I didn’t take the advice when someone gave it to me.

Steve,27, teacher

Your teachers only want what’s best for you.

When I was in school, I never thought I’d become a teacher. I acted badly in class, and I feel 4. about that now. I love my job and I know how challenging it is, so I hope kids can show their teachers more respect(尊重). I hope kids can5. that teachers push them to do their best and not just to give them a hard time.

Anna,29, doctor

Money doesn’t grow on trees.

When I was a teenager, I never learned 6.to save money. I just spent it! My parents gave me everything I wanted, but I realize now they spent little 7. themselves. Now I wish I knew more about planning my money, and I am not the only one! It seems that today's teenagers know about money planning even less 8.me years ago. I do wish they could learn about it earlier.

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Scientists in Britain and the United States have made a new kind of enzyme(酵素) that eats plastics(塑 料). 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(发 现) 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 plastic-eating abilities work faster and better.

John McGeehan, one of the lead researchers, said, “We’ve made an improved enzyme. It’s better than the naturl 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(大量的). “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.According to the scientists, the enzyme may solve the poblem of pollution.

A. air B. water C. light D. plastic

2.The underlined phrase “break down” in the passage probably means “ ” in Chinese.

A. 实验 B. 生产 C. 发明 D. 分解

3.Researchers discovered that a natural enzyme helped eat plastics .

A. in B. in the US C. in Japan D. in China

4.Which of the following is TRUE according to the passage?

A. The scientists are sill trying to improve the enzyme.

B. The enzyme will pollute large areas of land and water.

C. The natural enzyme woks better than the improved one.

D. The natural enzyme is harmful to humans and animals.

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