Every scientist has a childhood dream. A scientist in China once had a(n)   36 . He wished to grow a new type of rice which could produce a lot. This person is Yuan Longping   37  was born in 1930. He graduated from the Southwest Agricultural(农业) University in 1953. Yuan Longping came up with an idea for a hybrid rice in the 1960s. Since then, he has devoted himself to the research and development of new varieties(品种).
In 1973, together with other people, he   38  in the development of hybrid rice. This made China be a worldwide leader in rice production. For this, he was called Father of Hybrid Rice. In 1980, the technology for hybrid rice was   39  to the United States.   40  Professor Yuan’s hard work, China now produces enough rice to   41  her people every year.
In his spare time, he loves playing   42  violin and listening to music. Every night, he reads   43  half an hour before he goes to sleep. He likes swimming, too.
It is said that Professor Yuan is one of the   44  people in China. And he cares about   45  but his research.
Now Professor Yuan is working on developing super hybrid rice. He goes to the fields twice a day.

Do you still get free plastic bags from the supermarkets? Things have changed.

China has banned（禁止）free plastic bags in? shops and supermarkets，and people have to pay for using plastic bags. The rule started on June 1st. It came because our country tried to make less litter. Making super-thin plastic bags has also been banned.

The Chinese once used about 3,000,000,000 plastic shopping bags a day，and they have caused pollution of the environment. The bags have become a main cause of plastic pollution because they are easy to break and people throw them away here and there. So the Chinese people are encouraged to bring their own bags for shop ping.

What kind of shopping bag is the best to bring? Some students in Chongqing have a good idea. They make their own shopping bags. They use old clothes to make cloth bags，and send them to their parents as presents. They also ask their parents and friends to use cloth bags instead of plastic ones. They think it is their duty to protect the environment.

根据短文内容，选择最佳答案。

1. People in China have to ?????? now.

A. throw plastic bags here and there

B. collect plastic bags in the street

C. pay for using plastic bags at shops and supermarkets

D. use free plastic bags at shops and supermarkets

2. China made this rule because plastic bags were bad for the ?????? .

A. environment????????????? ????????????? B. families????????????? ????????????? C. shops????????????? ????????????? D. supermarkets

3. The Chinese people are encouraged to bring ??????? for shopping.

A. no bags ????????????? ????????????? ????????????? B. free plastic bags

C. their own bags ????????????? ????????????? D. super-thin plastic bags

4.Some students in Chongqing ?????? .

A. ask their parents to make cloth bags

B. make cloth bags themselves

C. pick up plastic bags everywhere

D. buy cloth bags for their parents

5.What’s the main idea of this article?

A. Making super-thin plastic bags has been banned in China.

B. The bags have become a main cause of plastic pollution.

C. Some students in Chongqing begin to make their own shopping bags.

D. To protect the environment，free plastic bags have been banned in China.

China is a country that is changing very quickly over the past fifty years and   1  you look closely(仔细地) you can see it   2  in front of your eyes. Fifty years ago, everybody travelled around by bike. Today lots of people in China still ride their bikes  3  school or work, but many people also take the bus or travel   4   underground. There are some people who even drive their own cars. Shops   5  small businesses but now the centre of China’s cities are full of   6   department stores. In these department stores, you can buy  7  you want in one trip. You can buy food, toys, bikes and even televisions. Television is    8   change that China has seen. Many children would say that they can not imagine life   9  TV set , but years ago they had to live without them. The Internet and the computer have only recently become regular items in our lives. Without the Internet, people would not  10  to get information as quickly as they can now and the Internet helps to make people   11  friends all over the world. Computers help   12  children and adults in their   13  lives Many students are lucky enough   14 able to use them to do their homework or   15  with their friends and sometimes play games.

In the 13th century, Marco Polo travelled a long way to China. He was a famous Italian 31 During his stay in China, he saw many wonderful things. One of the things he 32 was that the Chinese used paper money. People in 33 coun­tries didn’t use paper money until the 17th century. However,people in China began to use paper money in the 10th century. 34     was invented by a Chinese about 2 000 years ago. His name was Cai Lun. He then 35 these pieces of paper together and made them into a 36 .
Now paper mainly comes from trees. We use it every day. 37 we waste a lot of it. If we keep on doing so, people 38 cut down many more trees. Then there will not be any trees left. If there are no 39 , there will be no paper.
So how can we 40 paper? When we mak­ing notes,we can use 41 sides of each piece of paper. We  can  buy  drinks  in bottles instead of 42  in paper packets. We can also use cotton handkerchiefs ( 棉手帕) and not the paper ones.
43  we go shopping, we can use fewer paper bags. If the salesman gives us a paper bag, we can keep it and 44  it later. We can help to protect trees if we think 45 . We should to it now,before it is too late.