Did you hear of the supercomputer? Recently, China’s Tianhe-1 (天河一号) was ranked as the world’s fastest supercomputer, according to a new list of world’s TOP 500 supercomputers.
It took 200 Chinese scientists two years to build the fastest supercomputer. It can do 2,507 trillion (万亿次) calculations in a second! That means it will take a personal computer 600 years to finish the work that a supercomputer does in a day!
The US now leads the world in the area of supercomputers. It is home to more than half of the world’s top 500 supercomputers. Japan also has advanced technology. China is developing its supercomputer technology quickly. But experts say it will take years before China’s total computing power can catch up with that of the US.
Supercomputers can work on many different things. They can solve problems in areas like national defense (国防), energy and science. In business, you can also use supercomputers. Oil companies use them to find oil and gas. Banks use them for quick trades. Food companies even use supercomputers to make sure that they put potato chips into cans without breaking them.
To make a supercomputer, scientists first need to link (连接) thousands of small computers together. Then they use software to turn them into one supercomputer. In fact, any person with enough knowledge about computers can make a supercomputer. But you need the top technology to make a supercomputer run fast.The world’s fastest supercomputer ________.
| A．was made in America |
| B．was made within two months |
| C．can do 2,507 trillion calculations in a minute |
| D．was made by 200 Chinese scientists |
Among the world’s top 500 supercomputers, ________ of them are made in the US.
| A．less than 20% | B．more than 50% |
| C．less than 50% | D．more than 20% |
The main idea of the fourth paragraph is ________.
| A．supercomputers can be used in different kinds of areas |
| B．supercomputers can work fast |
| C．supercomputers can only be used to find oil and gas |
| D．supercomputers can be used to make money |
According to the passage, to make a supercomputer, ________.
| A．you needn’t know enough knowledge about computers |
| B．you need to know how to play computer games |
| C．scientists first need to link thousands of small computers together |
| D．scientists first need to make some software |
Which of the following is true?
| A．A personal computer needs 300 years to finish the work that a supercomputer does in a day. |
| B．Japan now leads the world in the area of supercomputers. |
| C．Supercomputer can be used by food companies. |
| D．Scientists needn’t use software to turn small companies into one supercomputer. |
Stephen Hawking was born in Oxford(牛津)，England on the eighth of January, 1942. He went to school in ST Albans-a small city near London. After leaving school, Mr. Hawking went to Oxford University where he studied physics, then he went to Cambridge University(剑桥大学)．
When he was 20 years old, Mr. Hawking got a bad illness. He couldn't speak or move without the help of a machine(机器)．Doctors said they had no way to help him. He would die before he was 23. At first, Mr. Hawking became very sad. After a while, though, he began to see his life in a different way. He worked hard and later became a very famous professor(教授)．Today he still works at Cambridge University as a professor.
根据短文内容，回答问题
When was Mr. Hawking born?
How many universities did Mr. Hawking study in?
When did Mr. Hawking get a bad illness?
Did Mr. Hawking go to school in London?
Where does Mr. Hawking still work today.
Most people like bikes. Perhaps you ride a bike to school. Riding a bike can be great of fun.Do you know how to ride a bike safely?
Careful boys and girls learn to ride their bikes well before they go out on the road.How can you tell whether you are a good rider?
If you can ride a bike in a straight line,you can ride well .If you can’t ,you should practice riding in a safe place.
To be safe on a bike, you need to use both hands and both feet. Keep your feet on the pedals(脚蹬)and your hands on the handle bars.
You know that your bike is only for one person. It’s not safe to carry anyone with you. Keep yourself safe when you ride on a bike.Watch where you are going all times.
Before you learn to ride your bike well, you can’t ________.
A. ride out on the road
B. ride in a safe place
C. practice riding
When you ride a bike, it is _________if you don’t keep your hands on the handle bars.
A. safe B. dangerous C. important
What does the word rider mean in the passage?
A. A person who walks
B. A person who rides a bike
C. A person who drives a car
The best title for the passage is “__________”.
A. How to have a basket on your bike
B. Ride a bike safly
C. Riding a bike is fun
Which of the following is right?
A. People don’t like to ride a bike to school.
B. Few people like riding a bike.
C. It’s safe to use both your hands and both your feet if you ride a bike.
Mary is an American girl. She is now in Beijing with her parents. Mary doesn't know much Chinese, but she is studying it. She often speaks Chinese with her Chinese friends. Sometimes they can't understand her, because she can't speak Chinese very well. It's Saturday morning. She goes out. She is walking in the street. She wants to go to the zoo to see the elephants and monkeys, but she doesn't know how to get there. She asks a Chinese boy the way. The boy can't understand her. Then she takes out a pen and a piece of paper. She draws an elephant on it, and shows the picture to the boy. The boy understands, and shows her the way to the zoo.
根据短文内容，选择最佳答案。
Mary is__________ .
A. Chinese
B. English
C. American
Mary is in__________ with her parents now.
A. Shanghai B. Beijing C. New York
Mary doesn't know how to get to__________ .
A. the zoo B. the park C. her home
Mary can't speak__________ very well.
A. English B. England C. Chinese
At last The boy__________ .
A. can understand Mary's Chinese
B. takes her to the zoo
C. shows her the way to the zoo
A good breakfast is important. You can easily understand it. By breakfast time you have not eaten anything about twelve hours. Your body needs food for morning activities(活动). One good breakfast should be rice or bread, an egg , milk and fruit. On a cold morning a cup of hot drinks is necessary(必需的). A good breakfast helps you to smile more easily. It helps you to be more friendly and also to work better and play more happily. Your whole day will be more fun after you have enjoyed a good breakfast.
判断正误，正确的写“T”，错误的写“F”It's not very important to have a good breakfast.
Food is needed in the morning because you have had nothing to eat for the whole night.
Only rice or bread will be a good breakfast.
If you get up late, your body doesn’t need food for morning activities
A good breakfast is helpful to you.
请认真阅读下面短文，并根据短文内容回答问题。
Black Friday
Thanksgiving is always on a Thursday. The day after it has been known as Black Friday. It is the start of the holiday shopping season, and it has been the busiest shopping day of the year in the US since 2005.
Most stores offer big sales on Black Friday. They open their doors quite early in the morning. They try to attract shoppers with big discounts (打折). Some items (商品)like TVs and cloths are much cheaper than usual. Stores may even lose money on these items. They hope that shoppers will buy gifts for other people while they are in the store.
Black Friday is a great time to go shopping. However, there are problem. The biggest one is that there are not enough low-priced items. Each store may only have a few. These items are in great need, so people stand in long lines to get them. They may wait three to four hours before a store opens. They may be hoping to get a low price on a TV or computer, but not everybody can get one. Some people leave, disappointed.
The situation makes people worried. Some Black Friday events have been crazy. There have been fights over toys among shoppers. Some workers have even been hurt by large crowds. But most Black Friday events are safe and fun. Still, if you plan to go, you will expect large crowds and a bit of pushing.
So where does the name “Black Friday” come from? It was first used in Philadelphia in the 1950s. The police called this day Black Friday because of the heavy traffic it caused. In the 1960s, stores tried to rename the day “Big Friday”. It did not stick. The name “Black Friday” continued to spread across the country. It seems that it is here to stay.
Now people all over the country take part in Black Friday events. It is even spreading to other parts of the world. Stores have held Black Friday events in the UK, Australia, and Brazil since 2012. In Mexico, stores offer a weekend of discounts every year. They call it “El Buen Fin”, which means “the good weekend” in Spanish. I guess people everywhere like to buy things on sale.
Is Black Friday the start of the holiday shopping season?
_________________________________________________________________________What is the biggest problem with Black Friday?
_________________________________________________________________________How long may people have to wait before a store opens?
_________________________________________________________________________Where was the name “Black Friday” first used in the 1950s?
_________________________________________________________________________Why do people like going shopping on Black Friday? __________________________________________________________________________
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