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

2.. From the text we learn that __________ .

3. If you haven’t got a megaphone, ____ will help you to make your voice travel farther.

Have you ever been ill? When you are ill, you must be unhappy because your body becomes hot, and there are pains all over your body. You don’t want to work, and you stay in bed, feeling very sad.
What makes us ill? It is germs(细菌). Germs are everywhere. They are very small and you can’t find them with your eyes, but you can see them with a mi­croscope(显微镜). They are very very small and there could be hundreds of them on a very small thing.
Germs are always found in dirty water. When we look at dirty water under the microscope, we shall see them in it. So your father and mother will not let you drink dirty water.
Germs can be found not only in water but also in air and dust(灰尘). If you cut your finger, if some of the dust from the floor goes into the cut(割开处), some of the germs would go into your finger. Your finger would become big and red, and you will have much pain in it. Sometimes the germs would go into all of your body, and you would have pain everywhere.
【小题1】Which of the following is true?

A famous story about happiness

Mrs Jones, a 92—year—old lady, dresses__1___ well each morning before 8 o’clock. This morning  she got up early, dressed up as before, because she would move to a nursing home.

After many hours of waiting in the lobby(通道)，she __2__ sweetly when a young lady told her that her room was ready,.“ I love it,”she answered___3___ , like a 8---year---- old girl who has just received a new gift.

“Mrs  Jones, you haven’t seen the room……just wait. You __4__here for such a long time, I’m very sorry……”

“It doesn't matter” ,she said.“ Happiness is something you decide on. I don’t mind how the furniture(家具) is placed or anything else in the room. I have already ____5___ to love it. Every morning I get out of the bed, feeling thankful for my body parts that work,. Each day is a _6_. As my eyes open, I’ll focus on (专注于) the __7__day and all the happy things……”

Please _8__:Happiness is an attitude(心态)。

1.用下列词语的正确形式填空（每空1分）

gift    decide   wait   her   smile   remember   happy   new

2.回答下列问题， 每题 1 分

（1）why did this old lady move to the nursing home?

_____________________________________________.

（2）What do you think about happiness?

_________________________________________________.

Have you ever been ill? When you are ill，you must be unhappy because your body becomes hot，and there are pains all over your body. You don't want to work，you stay in bed，feeling very sad.

　　What makes us ill? It is germs(细菌). Germs are everywhere. They are very small and you can't find them with your eyes，but you can see them with a microscope. They are very small and there could be hundreds of them on a very small thing.

　　Germs are always found in dirty water. When we look at dirty water under the microscope，we shall see them in it. So your father and mother will not let you drink dirty water. 

　　Germs aren't found only in water. They are found in air and dust. If you cut your finger，if some of the dust from the floor goes into the cut(割开处)，some of the germs would go into your finger. Your finger would become big and red，and you will have much pain in it. Sometimes the germs would go into all of your body，and you would have pain everywhere.

1.Which of the following is TRUE?

A. If things are very small，they are germs. 

B. If things can't be seen，they must be germs.

C. Germs are only in dirty water.     

D. Germs are everywhere around us. 

2.What is a microscope used for?

A. Making very small things look much bigger.

B. Making very big things look much smaller.

C. Helping you read some newspapers.

D. Helping you if you can't see things clearly. 

3.Why don't your parents let you drink dirty water?

A. You haven't looked at it carefully.　   B. Water can't be drunk in this way.

C. There must be lots of germs in it.　   　　D. Water will make you ill. 

4.Which of the following is NOT true?

A. Germs can be found both in water and in the air.

B. Germs can go into your finger if it is cut.

C. If your temperature is not OK，there must be germs in your body.

D. If your finger isn't cut，there aren't any germs on it. 

5.What's the main idea of the passage?

A. Germs may make us ill.　　　　    B. Germs are in dirty water.

C. Don't drink dirty water.　　　　     D. Take care of your fingers.

—You haven’t been to the West Lake, have you?
—____. But I will go there with my parents this summer vacation.