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.

1.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.

2.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

3.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

4.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

5.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

In Xinjiang, most people knew the stories of Avanti. Avanti was a very clever man. People liked him because he not only spoke for the poor but also was always ready to help them.

One day Avanti walked on the street and saw two men arguing with each other. A lot of people stood around them. One of the two men was the owner of the eating house in the town and the other was a young man. The young man just passed by the eating house. The owner of the eating house told the young man to pay him money. The young man explained（解释）that he hadn’t taken anything from the eating house. But the owner said that the young man had taken the smell of the nice food from the eating house, and he must pay for it. So Avanti went up to the owner and said, “ I’ll pay you the money.” Avanti took out some coins（硬币） from his pocket and put them into his bags. He shook his bag, and people heard the sound of the coins. Then Avanti said to the owner, “ Take away the sound of the coins. That’s what I pay for the smell of your food.”

1.People liked Avanti because ______________.

A. he was clever and disliked helping the poor

B. he was rich and liked helping the poor

C. he was wise and liked to help the poor

D. he was too poor to help the rich

2. One day Avanti saw two men _____________.

A. arguing about the eating house

B. arguing about the payment

C. eating in the eating house

D. laughing at the people around them

3. The owner of the eating house told the young man ____________.

A. to pay enough money for his food

B. to pay the money for broken bowls

C. to pay for the smell of the food

D. to pay for the service

4. Avanti wanted to help the young man, so _____________.

A. he helped the young man out of trouble

B. he would pay for the money instead of the young man

C. he asked the owner not to ask the young man for money

D. he asked the young man to make friends with the owner

5.Avanti paid the owner of the eating house _____________.

A. enough money???????????????? B. some coins

C. a lot of things????????????????? D. the sound of coins

The King lived a small house near New York with their child . Sometimes Mr King came back from work very late. When his wife and the child were asleep, he opened the front door of his house with his key and came in very quietly.

But one night when he was coming home late, he lost his key. So when he reached his house , he rang the bell. Nothing happened. He rang it again. Again nothing happened. Nobody moved inside the house. Mr King knocked at the bedroom window. He spoke to his wife, he shouted, but she didn’t wake up. At last he stopped and thought for a minute. Then he began to speak like a small child. “Mum,” he said, “I want to go to the toilet.” He spoke quietly, but at once Mrs King woke up. Then he spoke to her, and she opened the door for him.

1.When Mr King came back very late from work and his wife was asleep, he usually came into his house         .

A．with his wife’s help

B．by knocking at the door

C．with his child’s help

D．by opening the door with his key

2.One night when he found his key lost, he first        .

A．spoke to his wife

B．shouted at his wife

C．rang the bell

D．knocked at the bedroom window

3.Mrs King woke up because           .

A．she heard the sound of the bell

B．she heard Mr King’s voice

C．she heard a knock at the door

D．she heard the voice “mum” like her child’s

4.Like a small child, Mr King spoke to his sleeping wife          .

A．loudly                                B．in a low voice

C．angrily                                D．with tears in his eyes

5.At last              .

A．Mrs King opened the door for Mr King

B．his child opened the door for Mr King

C．Mr King opened the door by force

D．Mr King opened the door with his wife’s key

Stop! Listen! What do you hear? You may hear many different sounds. Some of those sounds may be noisy. Noise is loud and unwanted sound.
Noise can be caused by many kinds of machines, such as motorcycles, jet planes, tractors and so on. And, to some people, rock bands are also noise.
What happened to people who live near noisy machines or use them over a period of time? Doctors find that these people have trouble in sleeping, But, most important, constant loud noise can cause a loss of hearing.
Scientists use a unit of measure called a decibel to measure the loudness of a sound. The sound of a quiet room, for example, measures 35 decibels. Talking measures between 40 and 65 decibels. Sounds from traffic and from some rock bands can measure over 120 decibels. Noise at this high level causes the greatest hearing loss.
【小题1】 From the article we know noise is ___________.
wanted sound               B. loud and unwanted sound
C.  all sounds that you can hear    D. comfortable sound
【小题2】  A “decibel” is a _________