DNA is the whole "map" of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.
People have been trying to understand the human body for a long time. In I860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called "genes"(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages. They’re written in the DNA with a special language.
In 1961, another two scientists found the first "word" that they could understand in that language. It shows how DNA tells the cell (细胞)to build its parts, the words in the DNA map, but we still do not understand what they all do. By understanding what just one "word" means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.
Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more "words" and find out more information, we will use it in the wrong way, just to make people more attractive, or stop sick people getting jobs. The two scientists found ______in 1961.
| A．all the words in the DNA map |
| B．small things called "genes" in our body |
| C．the first "word" they could understand in that language |
| D．those small parts arc written in the DNA with a special language |
How can we help sick people if we understand more "words" in the DNA map?
| A．Make better medicine. |
| B．Make them get jobs. |
| C．Make maps for them. |
| D．Make them attractive. |
Which one is NOT TRUE according to the article?
| A．We look like our parents because of "genes" in our body. |
| B．We have understood what all the words in the DNA map do. |
| C．DNA is the whole "map" of the human body. |
| D．DNA tells the cell to build its parts. |
What do people think about this research about DNA?
| A．It can be only bad. |
| B．It can be only good. |
| C．It can be good but won't work. |
| D．It can be good and bad |
Perhaps once you got free plastic bags when you shopped at the supermarket. But now things have changed already.
Since June 1, 2008, China has banned(禁止) its shops and supermarkets providing free plastic bags. Shoppers have to pay for bags if they need them. “We hope it will encourage people to use cloth bags and baskets for their vegetables,” said a spokesman from the Chinese government. “Plastic bags have led to a big waste of energy and on the other hand, they pollute(污染) the air, rivers and soil. It takes around 1000 years for the bags to break down. They are also dangerous to wildlife, which eats them without knowing.”
A large number of Chinese people have begun to make their own cloth bags. Li Linwei, a student in Shenyang, Liaoning Province, made a bag out of an old dress of her mother’s. “ I have given it to my grandmother as a Mother’s Day present. From now on, she will use it when she goes shopping.” said the girl.
根据短文内容，回答下列问题。
1. Since what time, supermarkets have been stopped from providing free plastic bags?
2. Without free plastic bags, what will people use when they go shopping according to the passage?
3. Do plastic bags pollute the environment?
4. How long will it take the plastic bags to break down?
5. What present did Li Linwei give her grandmother on Mother’s Day?
In the United States, it is important to be on time, for a date, a class, a meeting, etc. However, this is not true in all countries. Mr. Moster, an American professor, arrived at the classroom on time on the first day in Brazil, but no one was in the classroom. Many students came after 10 am. Several arrived after 10:30 am. Although all the students greeted the professor as they arrived, few students felt sorry for their lateness.
The professor talked to the Brazilian students about lateness and found something surprising. If the Brazilian students had a lunch date with a friend, most of them felt the friends were late for about half an hour.
In an American university, classes not only begin on time, but always end on time. On the other hand, in Brazil, neither the teachers nor the students arrive at the starting time. Arriving late may not be very important in Brazil.
As a result of his study, the professor learned that the Brazilian students were not being impolite. So he was able to understand and felt comfortable in the new culture.
根据短文内容,判断正(T)误(F)
It is important to be on time in America.
Many Brazilian students felt sorry for their lateness.
In Brazil, teachers are usually on time while students are usually late.
The professor felt uncomfortable about students’ lateness after his study.
The article tells us different countries have different cultures.
| 1.______________ |
I’m looking for a pen pal who likes music. I live in Germany.Please write to me:Colin, PO Box, 134, Bonn, Germany |
| 2._____________ |
Do you like animals? Do you have pets? I have a lovely pet dog. Anyone who has the same interest as me can write to me:Thanh Chu, 678 Tok Chi Road, Ho Chi Minh City, Vietnam. |
| 3.______________ |
I’m interested in movies and swimming. I’m from Spain and I can speak a little English. Please write to me: Sophia, 643 Calle, Spain. |
| 4. ______________ |
I’d like to write to a Chinese girl to practice Chinese and want to know more about Chinese culture. Please write to me:Cathy, Flat 4,105 Fifth Avenue, New York, US. |
| 5. _______________ |
Hello, I’m Simon from the U.K. My hobby is playing chess. I hope to have friends who can beat me in chess on line. My e-mail:sunny@Hotmail.com |
根据所提供的信息为以上的外国学生找到合适的笔友.
A. Gao Lin is good at playing chess and he came first in the City Chess Competition last year.
B. Li Wei likes animals. He keeps some pets and he is very kind to them.
C. Wu Tong majors in Chinese history in a university. She wants to communicate with foreign friends about Chinese culture.
D. Zhang Rui can speak a little Spanish and English. In her free time, she likes swimming and watching movies.
E. Liang Chen is a music lover. She wants to have a foreign friend who speaks German.
One day, Mr Read and his son Robert were going out for a walk. He put on a pair of shoes together with a pair of different socks, one white and one yellow. As he came out of his house, his son noticed the colors of his father’s socks and said, “You’ve put on two different socks, Dad.” When he heard this, he looked at his socks and found that his son was right. He was happy and said to himself, “What a clever son I have got!” Then he asked his son to go back to the house to get another pair of socks for him. When the son went back to his house, all he could find was one white sock and one yellow sock. Robert then took the socks to his father and said, “It’s no use changing. These socks at home are also different, one yellow and one white.” Mr Read agreed with his son and they went out for a walk.
根据短文内容,判断句子正(T)误(F).
1.Mr Read put on a pair of different shoes before he went out for a walk.
2.The socks were yellow and white.
3.Robert found a pair of socks for his father.
4.They went back home to change socks.
Mr. Read was a smart man.
The sun went down when an old man came to a small mountain village with a heavy bag. He found an inn(小旅馆) and wanted to stay there for the night.
After he had gone to his room, the owner of the inn said to his wife, “Look at his heavy bag, dear! I’m sure there’re a lot of valuable(贵重的) things. I want to steal it when he’s asleep tonight.” “No, no,” said his wife. “He must look for his bag tomorrow morning. Then he’ll take you to the police station.”
They thought hard and at last the woman had an idea. “We have forgetful grass,” said the woman. “Why not put some into his food? If he has the food, he’ll forget to take his bag away tomorrow morning.” “How clever you are!” said the owner, “don’t forget it when you cook supper for him.”
The old man had the food with forgetful grass and went to bed. The next morning, when the owner got up, he found the door was open and the old man had left. He looked for the bag for a long time, but he didn’t find it. He hurried to wake his wife up and said angrily, “What a fool! Your forgetful grass isn’t useful at all!”
“No, no,” said the woman. “I don’t think so. He must forget something.”
“Oh, I’ve remembered!” the owner called out suddenly, “He forgot to pay us the bill!”
1. The old man carried __________ when he got into the inn.
A. a large camera B. a heavy bag
C. an umbrella D. a heavy basket
2. What did the owner want to do? _________________
A. He wanted to call the police.
B. He wanted to kill the old man.
C. He wanted to steal the old man’s bag.
D. He wanted to invite the old man to dinner.
3. The old woman put _____________ into the old man’s food.
A. some sleeping pills B. some pepper
C. some beef D. forgetful grass
4. The next morning the owner found ____________.
A. the old man left his bag in the inn B. the bag was still there
C. the old man had died D. the old man had gone with his bag
5. The old man forgot to __________________.
A. pay the owner the bill B. take his bag
C. look at the time D. say goodbye to the owner