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. 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

2.. 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

3. 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

 

Happy Farm is an online game. It is very popular among people in China. The game offers you a piece of empty land and some seeds (种子) at first. You are like the farmer. If your land is small, you can spend some money to make it big. And you must harvest your things on the farm on time, or some other farmers will steal your fruits, vegetables, milk, eggs and so on. Of course, you can steal theirs. If you want to make money, you must sell your things out.
Some Chinese websites have offered this game to its users. So far, it is said that about 16 million Chinese people are playing this game. Some people were so crazy (疯狂的) that they even get up in the midnight to harvest their crops and steal others’.
Happy Farm brings happiness to people. It is really a fascinating game. But it also brings many problems. It is reported that a baby died in a hospital just because the doctor didn’t give him timely treatment. Do you know what the doctor was doing? He was playing Happy Farm! There are many stories like this.
【小题1】According to this passage, what is very popular in China?

A．The farmer	B．Happy Farm
C．The Chinese website	D．The Doctor

【小题2】Which is the right order to play the game Happy Farm?
a. Plant some crops.         b. Harvest your crops on time.   
c. Sell your things out.       d. Get land and some seeds.

A．d-b-c-a

B．a-d-c-b

C．d-a-b-c

D．c-d-a-b

【小题3】Many people are so involved in the game Happy Farm that they get up in the midnight _____.

A．to harvest and steal crops

B．to chat with others

C．to sell their things out

D．to read news about this game

【小题4】What does the writer think of this game?

A．It is not interesting at all.

B．People shouldn’t be crazy about it.

C．People must get up early to steal crops.

D．People may play it when they are at work.

根据所掌握的文化或背景知识，选择正确答案．

1.How do we deal with our problems?

A．By learning to forget.

B．By regarding problems as challenges.

C．By thinking of something worse.

D．All above.

2.This is Mary Allen Brown．She is a doctor．You can call her______.

A．Mrs Mary

B．Mr Brown

C．Dr Brown

D．Ms Allen

3.Which is the right statement according to Unit 2 of Book Three?

A．Martin Murray used to be a “problem child”

B．Martin Murray’s father helped him get out of trouble.

C．Martin Murray’s mother died a few years ago.

D．Martin Murray’s never a top student in his class.

4.The PPC was founded on _______. Thanks to our Party, we’re living a happy life.

A．July 1st, 1921

B．August 1st, 1928

C．October 1st, 1949

D．May 4th, 1919

5. Huanggang City lies in the________ of Hubei Province..

A．northwest

B．northeast

C．southeast

D．southwest

6._________ will hold the 30^th Olympic Games. And it’s also a developed country.

A．England

B．Japan

C．France

D．Brazil

 

One day, Mr. Green and his little son were going home. At this age, the boy was interested in all kinds of things and was always asking questions. Now, he asked, “What’s the meaning of the word ‘Drunk’, dad?” “Well, my son,” his father replied, “Look, there are standing two policemen. If I think of the two policemen as four, then I am drunk.” “But, dad,” the boy said, “ there’s only ONE policeman!”

The bus is very crowded. A man tries to get on, but no one gives a way to him. “Hey, let me get on the bus.” the man shouts. “It’s too crowded. You’d better take the next bus.” a passenger says to him. “But you can’t go without me. I’m the __________.” the man says.

Mr. Black was hit by a car in the street. He was brought to the hospital. His wife who was standing up by his bed said to the doctor, “I think that he is badly hurt.” “I am afraid that he is dead.” said the doctor. Hearing this, Mr. Black moved his head and said, “I’m not dead. I’m still alive.” “Be quiet.” said the wife, “The doctor knows better than you!”

【小题1】Which is the right word to fill the blank in the second passage?

A．driver

B．teacher

C．doctor

D．singer

【小题2】Which of the following is TRUE according to the passages?

A．There are only a few passengers on the bus.

B．Mr. Green had drunk a lot before going home.

C．Mr. Black lost his life because of a car accident.

D．Mr. Green and his son saw two policemen on their way home.

【小题3】In which part of a newspaper can you most probably read the three passages?

A．Advertisement	B．Found and Lost
C．Latest News	D．Fun Time

Teeth are important. Strong, healthy teeth help you chew foods that help you grow. They help you speak clearly. And, they help you look your best. Here are some advice for you to take care of your teeth.
● Brush your teeth the right way.
Brush your teeth at least twice a day after breakfast and before bedtime. If you can, brush after lunch or after sweet snacks（快餐）, too.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
Brush all your teeth, not just the front ones. Spend time brushing teeth along the sides and back of your mouth. Brush away from your gums（齿龈）, too.
Spend at least three minutes each time you brush. Play a song you like to help pass the time.
Get a new toothbrush every three months. When you buy your tooth brush, be sure it has soft bristles（鬃毛）.
● Learn how to floss your teeth.
Flossing is a very important way to keep your teeth healthy. Food may hide in places where a toothbrush cannot get to, like the space between the teeth. Flossing can help get rid of it. Carefully move the floss between two teeth, up and down. You need to floss your teeth at least once a day.
● Have good eating habits.
You need to be careful about what you eat and drink. Eating sugar is a major cause of tooth decay（腐朽）. Eating sugar before you go to bed can make things even worse. Eat lots of fruit and vegetables and drink water instead of soda.
【小题1】           is helpful to your teeth.

A．Eating fruit and vegetables	B．Eating sweet snacks
C．Eating sugar	D．Drinking soda

【小题2】 Which is the right way of brushing the teeth?

A．We should brush our teeth once a day.

B．We should keep our toothbrush away from our gums.

C．When we brush our teeth, at least three minutes is needed.

D．Brush our teeth before breakfast.

【小题3】 From the passage, do you know how to floss the teeth?

A．Go to see a dentist.	B．Fix a floss on the teeth.
C．Move the floss between two teeth.	D．Chew the floss in the mouth.

【小题4】Which of the following is NOT true ?

A．Flossing can help get ride of the food that hides between two teeth.

B．Healthy teeth can help you look more beautiful.

C．We don’t have to brush our teeth if we eat a lot of fruit and vegetables.

D．Your toothbrush should be changed every three months.

【小题5】 The best title for the passage is          .

A．How to floss your teeth.

B．How to have good eating habits.

C．How to brush your teeth.

D．How to take care of your teeth.