【题目】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( ). 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.

1According to the scientists, the enzyme may solve the poblem of pollution.

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

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

A. 实验 B. 生产 C. 发明 D. 分解

3Researchers discovered that a natural enzyme helped eat plastics .

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

4Which 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.

【题目】Cardening is popular in many parts of the world. It brings us sweet smelling flowers, fresh fruit and vegetables. But you can get more from your garden.

Cardeing helps to keep healthy. Today’s people sit indoors for too long and don’t get much exercise . When you garden,you have to move around . It’s a good chance for you to exercise your body by watering flowers or doing some digging.Besides, when you are in your garden, you can feel thewarm sunshine. This means you are getting Vitamin D.It help your bodies use calcium (),which necessary to keep your bones(骨骼) strong.

__________ It gets them off computers, televisions and phones. Cardening can be great teacher to teach children about nature and healthy eating. It can also help them to understand the meaning of “No pains, no gains.”

Cardening is a great way to meet people and build relationships. When you are gardening, you are outdoors. So it is a perfect time to communicate with your neighbors. Most people love to talk about their hobbies, and so do gardeners. They usually enjoy showing people what they are growing. And most enjoy sharing advice and stories about their gardens.

1When it’s , you can get Vitamin D in your garden.

A. sunny B. cloudy C. snowy D. rainy

2According to the passage, is one of the gardening activities.

A. watching TV B. watering flowers

C. walking dogs D. playing with phones

3Which of the following can be the missing part in Paragraph 3?

A. Cardening will be good for your bones.

B. Cardening may help people to feel happy.

C. Gardening is a great activity to do with children.

D. Gardening can be a good way to meet neighbors.

4The best title of the passage may be “ ” .

A. Outdoor Activities B. Advantages of Gardening

C. Healthy Eating Habits D. Relationships with Neighbors

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