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

 

1 

Which part is the most important?

My mother used to ask me what the most important part of the body is. When I was  1   .1 thought music and talking were the most important things, so I said: “My  2  Mommy.”

She said; "No. many people are deaf and can’t hear anything but they live normal lives. But you  3   thinking about my questions and I will ask you again soon. "

Several years passed before she asked me again. This time I told her_: “Mommy.  4 is very important to   5  , so it must be our eyes. "

She looked at me and told me: "You are learning fast, but your  6   is not right because there are many people who are blind and who arc happy and healthy all the same.”

Then, last year, my grandpa   7  .

Everybody was crying. My mom asked me: “Do you know the most important body

pan now, my dear? The most important body part is your  8  .”

“Is it because it holds up (支撑)my head?” I asked.

"No, it is because it can hold a head of a friend or a loved one when they  9  ."

she answered. “ Everybody needs a shoulder to cry on sometime in life. I only hope that you have enough love and friends in your life. So, you will  10  have a shoulder to cry on when you need it."

1. A. older             B. younger          C. cleverer

2. A. ears              B. eyes             C. mouth

3. A. stop              B. begin            C. keep

4. A. mind              B. heart            C. sight

5. A. everybody     B. somebody         C. nobody

6. A. question          B. problem          C. answer

7. A. came              B. died             C. arrived

8. A. shoulder          B. foot             C. hand

9. A. laugh         B. dance            C. cry

10. A. never            B. always           C. seldom

 

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

 

The summer sun is out, and we're beginning to feel the heat. Before you go outside to have fun, make sure you put on the right things!

Do you know what kind of clothes can make you look hot and keep you cool? Here are some ideas for clothes to help you look great.

Fun colors and cartoons are back from the 1980s this year; the dirty look is out. People will be looking for fresh bright colors this summer. Girls in pink look cute and sweet. And green makes everyone look more lively. Some of the best colours are cotton candy pink and lime green. These soft colours go well with jeans or just about anything else. As soon as you put on one of these colours, you'll feel like a star!

Some girls like something more interesting than all solid(单一的) colours. For them, there are lots of floral patterns (花卉图案) to choose from in shirts, dresses or skirts. A floral shirt looks nice with a light-coloured solid skirt or trousers.

Of course, jeans are in for boys. If you get too hot, try something lighter, like khaki cargo pants. They'll have enough pockets to keep everything you need for studying, playing and keeping cool! Army green is all the rage(盛行) this year.

1.This passage mainly tells us ____.

A．what colour to choose for summer clothes	B．how to make summer clothes
C．right colours for boys	D．how to hold a fashion show

2.The underlined word “in” probably means ____.

A．“在里面”

B．“流行的”

C．“参加”

D．“喜欢”

3.Which of the following statements is true according to the passage?

A．Colours, like red and green, look good with jeans.

B．A floral shirt goes well with a light-coloured solid skirt.

C．Light colours make people feel hot.

D．Army green is out this year.

4.Khaki cargo pants are special because they ____.

A．go well with floral patterns in shirts

B．make people want to dance

C．have enough pockets

D．are cheap

5.Which of the following colours may not look good in summer according to the passage? 

A．orange

B．pink

C．army green

D．black

 

In America, when people say“man's best friend”, they don't mean another person. Instead, they are talking about a lovely animal—a dog! These words show the friendship(友谊) between people and animals. Dogs and other pets can give joy to people's lives. Some people think of their pets as their children. Some people even leave all their money to their pets when they die!

Animals can help people, too. Dogs can be taught to be the“eyes”for a blind person (盲人) or“ears”for a deaf(耳聋) person. Scientists have found that pets help people live longer! They make people happier, too. Because of that, they bring animals into hospitals for“visits”.

Americans hold“Be Kind to Animals Week”in the first week of May. Pet shows are held during the week. Even if you don't live in America, you, too, can do this. How? First think about how animals make your life richer. If you have a pet, take more time this week to play with it. Remember to give it delicious food.

If you don't have a pet, be kind to animals around you. For example, if you see a street dog, just leave it alone, or make friends with it. If others around you do bad things to animals, try to speak up. As people, we must protect(保护) animals who can't speak for themselves.

1.“Some people even leave all their money to their pets when they die!”is used to prove(证明) that        .

A. pets have the right(权利) to inherit(继承) money

B. money can make pets happy

C. it's the best way to spend money

D. some pets are as important to their owners as their children

2.According(依照) to the passage, scientists bring the dogs to hospital because       .

A.they are ill and they need to see the doctor

B. they can make the patients(病人) happier

C. they can help the doctor find out the problems

D. the doctors can do experiment(试验) on them

3.During the“Be Kind to Animals Week”, the people in America        .

A. hold pet shows

B. play with the pets the whole week

C. cook delicious food for pets

D. make friends with other people's pets

4.Which of the following statements(陈述) is NOT true?

A. Dogs can help people in many ways.

B. Dogs can help people live happier.

C. Dogs can help people make everything

D. Dogs can make people's lives richer.

5.What is the main idea of the passage?

A.A lot of people are interested in dogs.

B. Dogs can help people do many things.

C. Pets are lovely and need care and protection(保护).

D. We have done a lot of things for pets.