Have you ever heard an echo of your voice?
An echo is a reflected(反射)sound. Stand in a very large, empty hall with nothing on the walls. Then shout. The sounds you make will hit the walls and come back to you. The walls reflect the sounds. These reflected sounds are called “echoes”.
We can use reflected sound to make sound travel farther. Hold a watch about fifty centimeters from your ear. You cannot hear it. The sound of the watch travels a short way in all directions. It does not travel as far as your ear. You can make it travel to your ear by using a roll of cardboard(纸板筒).
Make the roll of cardboard about fifty centimeters long. Put one end over your ear and hold the watch at the other. Now you can hear the watch because the sound has not gone in all directions. It is reflected down the roll to your ear.
A megaphone(喇叭筒)works in the same way. It makes sound travel farther. It reflects the sound into a beam which can travel a long way. In the ship, the sailor uses the megaphone to make his voice travel. Without the megaphone, his voice cannot travel far.
We use reflected sound in many ways. We use it to measure the depth of the sea, for example. Among the animals, bats and whales use reflected sound to tell them where they are and what things are near them.What is called “echo”?
| A．Very loud voices. |
| B．Very loud voices that are made by man. |
| C．Very loud voices that are made by animals. |
| D．The sound that is made by man or animals comes back from some place. |
We can hear our echoes if we .
| A．shout in a small room |
| B．shout in a large house full of things |
| C．shout in narrow valleys(山谷) |
| D．shout in the open air |
Which is the right order of hearing our echo in a very large, empty hall?
a. We hear the reflected sound
b. The sound returns to us
c. The sound hits the walls
d. We make a sound
| A．c, b, a, d | B．c, a, b, d | C．d, c, b, a | D．d, b, c, a |
From the text we learn that __________ .
| A．reflected sound is useful only to blind people |
| B．people haven’t made use of reflected sound yet |
| C．bats use reflected sound to fly and get food |
| D．whales don’t use reflected sound as they live in the sea |
If you haven’t got a megaphone, ____ will help you to make your voice travel farther.
| A．a long piece of wood | B．a roll of cardboard |
| C．a thin thread | D．a long piece of silk |
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It’s Friday afternoon，you can go to_______ .
| A．visit the museum | B．play soccer |
| C．play basketball | D．read children’s stories |
If you dial (拨号)66387901，you can __________.
| A．ask for some hotel information | B．do some shopping |
| C．have a good story time | D．order fast food in a restaurant |
You can not get any information about________ from the two notices．
| A．looking for a hotel | B．doing eye exercises |
| C．eating fast food | D．taking a taxi |
Scientists are very interested in the Universe，and they always want to know more about it. Years ago they knew many things about the moon. They knew how big it is and how far away it is from the earth. But they wanted to know more about it. They thought the best way was to send men to the moon. The moon is about 384,000 kilometers away from the earth. A plane cannot fly to the moon because the air reaches only 240 kilometers away from the earth. But something can fly even when there is no air. That is a rocket(火箭)
How does a rocket fly? There is gas（气体） in the rocket. When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up into the sky. Rockets can fly out into space. Rockets with men in them have been to the moon. Several rockets without men in them have flown to another planet(行星) much farther away than the moon. One day, rockets may be able to go to any place in space.Scientists knew ____________ the moon is.
A: how far B: how big C: how old D: both A and B The earth is about 384,000 kilometres away from the _____.
A: space B: universe C: sun D: moonA plane cannot fly to the moon because ___________
A: there is no air above 240 kilometers away from the earth.
B: there is no gas in the plane
C: the plane is not strong enough
D: the plane can not fly a long way The hot gas in the rocket is used for___________
A: keeping the air in the rocket fresh(新鲜的)
B: Keeping the men in the rocket warm
C: making the rocket fly up.
D: cooking food for the men What is the writer’s attitude(态度) to the universe’s future.
A: Realistic(现实的) B: Imaginative(幻想的)
C: Confident(有信心的) D: Sad
What’s your favorite cartoon? It may be difficult for you to decide. But for pianist Lang Lang, Tom and Jerry is the best one.
When Lang was two years old, he saw Tom play the piano. This was his first time to enjoy western music and this experience encouraged him to learn to play the piano.
His talent at the keyboard has taken him from Shenyang to the world. Lang became a good piano student at three. Ever since, the boy has been doing better and better. In 1997, the 15-year-old boy studied at a famous American music college.
Lang’s performances are energetic. He is well-known for making facial （面部的）expressions and moving around while playing the piano.
The road to success has never been easy. Lang’s father stopped his job to look after him, while his mother stayed in Shenyang to make money. But Lang thinks himself lucky and believes he should give something back. He has helped the children in poor areas a lot.What made Langlang first enjoy western music?
| A．When he played the piano at three. |
| B．When he saw Tom play the piano at two. |
| C．When he listened to the western music on the radio. |
| D．When his father taught him to read music. |
How old was Langlang when he became a student of a famous American music college?
| A．two | B．three | C．five | D．fifteen |
What is Langlang famous for?
| A．He is famous for playing the guitar. |
| B．He is famous for singing |
| C．He is famous for writing music. |
| D．He is famous for making facial （面部的）expressions and moving around while playing the piano. |
Why did Langlang’s mother stay in Shenyang?
| A．Because she liked Shenyang, she didn’t want to leave. |
| B．Because she had to look after Langlang’s grandparents. |
| C．Because she had to make money to pay for Langlang’s education. |
| D．Because she didn’t love her son. |
From the passage, we can say it _______ Langlang and his parents a lot of time to get success.
| A．spent | B．paid | C．took | D．cost |
Harry had a very small farm. He only had one cow but dreamed about having a large farm. He once asked his father Bill, “I’d like to have that land over there. How can I get it?” His father encouraged him to go and talk to the landowner(地主) to see how they could get the land. Harry said. “But we don’t have enough money.” His father said, “Don’t worry. Go and talk to him.”
Several years passed. Harry had not only the land, but also several hundred cows. He had a happy life with his wife.
Later, Harry’s wife, Sarah, had a dream. “I want to build the biggest farm in the world.” She said. They called their friend Manuel about this task. Three days later Manuel had a plan for the whole project. Then they asked, “How much will it cost?” Manuel said they needed a lot of money.
“Nobody will lend us so much money to build a farm,” they thought. But the manager of the bank trusted them and their dream.
A few months later, La manuel, the biggest farm in the world, was opened.The passage tells us that _________.
| A． A poor farmer is always a poor farmer. |
| B． Making your dream come true depends on (依靠)yourself |
| C． A good friend can help you in doing everything |
| D． Talk with your friends before you do everything |
The reason why Harry got the land and many cows was _______.
| A．he was rich |
| B．he got his help from his wife |
| C．he worked hard to get money |
| D．he borrowed money from the bank |
In order to(为了) make Sarah’s dream come true(实现),
Manuel _________.
| A．made a careful plan | B．lent her quite a lot of money |
| C．bought the biggest farm for her. | D．didn’t like her dream |
The underlined word “trust” means ________.
| A．know | B．understand | C．think | D．believe |
From this passage, we can learn that ________.
| A． Harry was a rich, energetic and clever man |
| B． Harry’s success comes from his dream amd working hard |
| C． Harry’s father and wife were both interested in making money |
| D． If you help others, you’ll get what you have paid |
Many students in China are learning English. Some of these students are small children. Others are teenagers(青少年). Many are adults(成年人). Some study at school, others learn by themselves. A few learn English language over the radio, on TV, or in the films. One must work hard to learn another language.
Why do all these people want to learn English? It is difficult to answer that question. Many boys and girls learn English at school because it is one of their subjects. They study their own(自己的) language and maths and English. Some people learn English because it is useful for their work. Many people often learn English for their higher studies, because at college or university(大学) some of their books are in English. Other people learn English because they want to read newspapers and magazines in English.Are there many adults learning English in China?
| A．No, they aren’t. | B．No, they are. |
| C．Yes, there are. | D．Yes, there aren’t. |
________learn English.
| A．Only teenagers. |
| B．Only adults. |
| C．Small children, teenagers and adults. |
| D．Only small children. |
Which of the following is true?
| A． Most people learn English over the radio. |
| B． All the people learn English at school. |
| C． Students only learn their own language at school. |
| D． Different people have different reasons for learning English. |
“Their own language” means_____________.
| A．Chinese | B．English | C．French | D．Japanese |
What’s the Chinese meaning of “learn by themselves”?\
| A．和他们一起学习 | B．自学 | C．向他们学习 | D．通过学习 |