As we know,we are short of water. It seems strange that about 3/4 of the surface of the earth is covered with water, but why are we still short of water? Because about 3% of water on the earth is fresh water which we can drink or use for watering plants directly. The rest is sea water.

  With the development of the modern society，we need more water. But how can we avoid the serious water shortage? First, we should learn how to save every drop of water. Second, we should find out the ways to reuse it. Some scientists have studied in this field for many years. Now people use water only once in most big cities. But people should use it again. For example，don't pour away the water that you have used，for you can use it to wash vegetables or fruits. You can use it to clean the floor,the windows or the toilet. Even if every large city reuses its water, we still have no enough water. What should we do next?

  The sea seems the best answer. There is a lot of water in the sea. All that we need to do is to make the salt out of sea water. But this process costs too much. Scientists are trying to find a cheaper way of doing it. If we find a proper way，we'll not worry about the danger of water shortage.

根据短文内容，选择最佳答案。

(   ) 1. About       of water on the earth is sea water.

A. 30%       B. 97%

C.3/4       D. 1/4

(   ) 2. How many tips that we need to do to avoid water shortage are mentioned in the passage？

A. 5.       B.4.
C.3.       D.2.
(   ) 3. People in most big cities should      

A.   reuse water

B.   use water once

C.   pour water directly

D.   use water to clean the floor

(   ) 4. Which is NOT true according to the passage?

A.    We are still short of water.

B.    People are always finding ways to reuse water.

C.    We have avoided water shortage.

D.    Most water on the earth is sea water.

(   ) 5. The passage is about .

A.   how to solve the water shortage

B.   how to change sea water into fresh water

C.   what we should do to save water

D.   what fresh water is

 My name is Marta. I live at the shelter. My mom,brother, and I came to the shelter six months ago. Our apartment building and car burned down. Now my mom can't work. So, we had to come to the shelter. When my mom goes back to work,we will get a new home. She is taking classes at the shelter. Soon,she will get a new job.

  I go to school near the shelter. Every day the bus comes to pick me up. My brother comes, too. When I first came to the shelter, the kids there teased me. It's better now that I've made some friends. My friend, Lisa,lives at the shelter, too. Sometimes I go to my friend Sam's house after school.

  Sundays are good. We go to the church next door to the shelter. We have lunch at the church. We can stay there all day. The people at the shelter have been very nice. Mom's classes are almost done. Mom will be able to look for a job. The shelter will help us find a new place to live. I hope it will be near the shelter. Then I can stay in my school and see my friends. Living in the shelter is OK. But it will be better to have our own place again.

根据短文内容，选择最佳答案。

(   ) 1. Why does Marta live in the shelter?

A.   She doesn't have a home.

B.   She doesn't have any money.

C.   Her apartment building burned down.

D.   All of the above.

(   ) 2. How does Malta's brother get to school?

A.    He takes the bus.

B.    His mom drives him.

C.    He walks.

D.    He rides a bike.

(   ) 3. What's the meaning of the underlined

word in Chinese?

A.爱护          B.嫉妒

C.戏弄          D.理解

(   ) 4. Why does Malta's mother take classes

at the shelter?

A.   To improve her working skills.

B.   To improve her language skills.

C.   To teach her children better.

D.   To know more people there.

(   ) 5. Which one is NOT true according to the passage？

A. Marta has been at the shelter for six months.

B.   Marta prefers living in the shelter.

C.   Marta and her friends usually go to church on Sundays.

D.   Now the people in the shelter are friendly to Marta.

 Mars is the fourth planet from the sun. It is 141 million miles away from the sun. A year on Mars is 687 Earth-days long. One day is about the same as on Earth： 24. 25 hours long.

  Mars is about half the size of Earth. Because Mars is smaller than Earth，its gravity is also less. If you weighed 100 pounds on Earth, you'd weigh about 38 pounds on Mars.

  Mars' surface looks like a red desert. There are mountains, canyons(峡谷).and volcanoes (火山)and so on. It is a dry planet without any liquid water(液态水).It does have ice caps at its north and south. Some of this ice is frozen(冻结的)carbon dioxide.

  Evidence shows that Mars once had rivers, streams, lakes, and maybe even an ocean. Scientists guess that there once was water on the surface of Mars that created these. Today the only water on Mars is either frozen in the ice caps or underground.

  Mars has mountains that are much higher than the mountains on Earth. Olympus Mons, the biggest volcano in the whole solar system， stands 17 miles tall！Mars also has bigger, deeper canyons than Earth's. Some of these are sixty miles long and five or six miles deep. How amazing！

根据短文内容，选择最佳答案。

(   ) 1. How long is the time of a year on Mars?

A.   About one year on Earth.

B.   About two years on Earth.

C.   About three years on Earth.

D.   About four years on Earth.

(   ) 2. According to the passage, the gravity on Mars is about       as strong as

it's on Earth.

A. four fifths    B. three fifths

C. two fifths    D. one fifth

(   ) 3. What does the surface of Mars look like?

A.   A red desert.

B.   Liquid water.

C.   The surface of Earth.

D.   The surface of the ocean.

(   ) 4. What's the meaning of the underlined word " evidence"？
A.材料          B.起源

C.清单          D.迹象

(   ) 5. What's the best title of the passage？

A.   The Earth is Different from Mars

B.   The Fourth Planet from the Sun

C.   Olympus Mons on Mars

D.   The Gravity on Mars

 Long long ago, man had only the sun and the moon for light. After they learned to 1 fire，they carried burning sticks to  2their way. Later they learned to  3 sticks into fat. The burning fat had a bright light and4 longer. After man learned to use a wick (灯芯).they 5candles which were improved as time went by. People still use 6 today.

  Later man made many kinds of oil lamps. These lamps 7coal oil(煤油)and had glass chimneys(灯罩).Later the gas light which needed 8 wicks nor chimneys was developed. All these lights had one thing in common——they had to be lighted 9 a fire.

  In 1897 ，Thomas Edison invented the light bulb. It can be 10 without a fire.
(   ) 1. A. make    B. do

       C. take    D. find

(   ) 2.A. do    B. have

      C. make    D. light

(   ) 3. A. come    B. go

       C. put    D. take

(   ) 4. A. stayed    B. worked

      C. made    D. lasted

(   ) 5. A. made    B. used

       C. invented    D. did

(   ) 6. A. fire    B. sticks

      C. candles    D. fat

(   ) 7. A. blew    B. burned

      C. fought    D. lighted

(   ) 8. A. neither    B. either

       C. both         D.all 

(   ) 9. A. as      B.like

      C. with    D. without

(   ) 10. A. lighting    B. lighted

       C. lights    D. light

A：This is our new invention——a water bed.

B：Oh，a water bed！ 1

A:For having a good sleep at night.

B;2

A：OK. This is the button to control the temperature. You turn it for warm or cool. And you will feel comfortable in any kind of weather or season.

B_:3

A：And look at this！It has a built-in CD player.

B：Oh，it's so interesting. 4 

A:It was made in Canada. 

B_:5

A:l，999 dollars.

B:0h， that's too expensive.I'm afraid I can't afford it.

A.   Can you show me how to use it?

B.   When was it made?

C.   How much is it?

D.   Where was it made?

E.    What is it used for?

F.    What can I do for you?

G.   That's great.

1.______ 2.______ 3.______

4.     5.____________

(   ) 10.——Which do you think is the most interesting invention?

      ——These beautiful clothes      are made of paper. They can keep us warm in winter.

A. who    B. what

C. which    D. where

(  ) 9. —How long have you been in Shanghai？

       ——It    4 years since we      here.

A.   is;moved

B.   has been;has moved

C.   was;moved

D.   was;has moved

(   ) 8. ―I don't know     to the railway station.

      —Don't worry！I will show you the way.

A. how to get    B. how will I get 

C. when to get    D. when I will get 

(  ) 7.——What should we do first if we want to develop our village?

        ——I think lots of new roads       first.

A. built        B. build

C. will build    D. will be built

(  ) 6. —Sorry！I have difficulty      what you said.

         —OK. I'll say it more slowly.
A. to catch    B. catching

C. catch        D. caught