There is not enough oil in the world now. As time goes by, it becomes less and less, so what are we going to do when it runs out? Perhaps we will go back to using horses, carriages and bicycles.

In the Second World War, some people didn’t use gas made from petroleum(石油) in their cars. They made gas from wood and plants instead. The car didn’t go fast, but they ran, so this was better than nothing. However, in the future, we can’t cut down all our trees to make gas; we need our trees for other things, too.

Besides different types of gas, we can also use electricity(电) to run our cars, but first we must make the electricity! Some countries have coal(煤) and they make electricity with that, but we might not always have coal, either. Other countries have big, strong rivers, and they can use the power of water to turn turbines(涡轮机) and make electricity more easily and cheaply.

We are also able to get power from the ocean tides. We put turbines into the mouth of the river. Then the tide comes in, the water turns the turbines and then it goes out, it turns them again.

Which of these ways will be used to run our cars in the future?

1.When might people have to go back to using horses and carriages?

A. When they are poor.  

B. When they run out of oil.

C. When they need more exercise.

D. When there aren’t any big trees in the world.

2.What did some people use to make gas in the Second World War?

A. Water.                    B. Coal.

C. Wood and plants.          D. Tides.

3.How many ways are suggested to make electricity in the passage?

A. 2.        B. 5.        C. 4.     D. 3.

4.According to the passage, which of the following statements is TRUE?

A. There is more petroleum than we can use now.

B. Trees are needed for some other things besides making gas.

C. We got electricity from ocean tides in the old days. 

D. Gas wasn’t used to run cars in the Second World War.

5.The passage is mainly about __________.

A. how to run our cars            B. what to do when oil runs out

C. different types of gas         D. the ways to make electricity

One day, a teacher was giving a speech to his students. He held up a glass of water and asked the class, "How heavy do you think this glass of water is?"

The students' answers ranged from 20 g to 500 g. "It does not matter on the weight itself. It depends on how long you hold it. If I hold it for a minute, it is OK. If I hold it for an hour, I will have an ache in my right arm. If I hold it for a day, you will have to call an ambulance (救护车). It is exactly the same weight, but the longer I hold it, the heavier it becomes. "

If we carry our burdens (负担) all the time, sooner or later, we will not be able to carry on, the burden becoming increasingly heavier. "

"What you have to do is to put the glass down, rest for a while before holding it up again. "

We have to put down the burden sometimes, so that we can be refreshed and are able to carry on.

So before you return home from work tonight, put the burden of work down. Don't carry it back home. You can pick it up tomorrow.

Whatever burdens you are having now on your shoulders, let it down for a moment if you can.

1.   The teacher brought a glass of water to the class because         .

2."A glass of water" in this passage referred to          .

3.According to the teacher, you may feel      _  if you put down the burden sometimes.

4.   This was a lesson about     ____ .

5.   Which of the following statements is TRUE according to the passage?

Life comes in a package. This package includes happiness and sadness，failure and success，hope and despair. Life is a learning process. Experiences in life teach us new lessons and make us a better person. With each passing day we learn to deal with kinds of situations．

Love

Love plays an important role in our life. Love makes you feel wanted. Without love a person could become cruel. In the early stage of our life，our parents are the ones who show us with unconditional love and care, they teach us about what is right and wrong，good and bad.

Happiness and Sadness

Happiness achieved by bringing a smile on others face gives a certain level of fulfillment．Peace of mind makes you feel happy. No mind is happy without peace. We realize the true worth of happiness when we are sad．

Failure and Success

Success brings in money，fame，pride and self-respect. Failure is the way to success, and it helps us to touch the sky，teaches us to survive and shows us a specific way. Here it becomes very important to keep our head on our shoulder．

Hope and Despair

Hope is what keeps life going. Parents always hope their children will do well．Hope makes us dream．Hope builds in patience．Life teaches us not to despair even in the darkest hour，because after every night there is a day. Life teaches us not to regret over yesterday, for it has passed and is beyond our control．Tomorrow is unknown, for it could either be bright or dull. So what we can choose is to work hard today，so that we will enjoy a better tomorrow.

1. In the passage，the author compares life to ___________

A. package? ????????????? ????????????? B. happiness and sadness?

C. failure and success? ????????????? D. hope and despair

2.What does it in the passage 4? mean ?

A. success?? B. failure????? ????????????? C. sky??????? ????????????? D. way

3.What’s the general meaning of the last sentence of the whole passage?

A. What you only can choose is to work hard everyday.

B. If you work hard today, you will have a better life in the future．

C.When choosing between "today”and “tomorrow”, you’d better enjoy tomorrow better.

D. Enjoying a better tomorrow is your only choice．

4.What’s the purpose of the passage?

A. To encourage people to love each other．

B. To tell people how to deal with happiness and sadness．

C. To remind people of keeping having a beautiful dream．

D. To give readers some information about life.

Antifreeze is a liquid(液体) that is added to water to keep it from freezing． When water freezes and turns to ice，it expands(膨胀)．The force of water expanding is so great that it will break the hardest metal．Water is used in car engines(发动机) to keep them cool while they run，and if this water is allowed to freeze in winter it can break the iron block of the engine．That is why antifreeze is necessary．
Water freezes at 0℃；the usual kind of antifreeze will not freeze until the temperature is－40℃．A mixture(混合物) of five parts of water and four parts of antifreeze will prevent freezing at－18℃；four parts of water and five parts of antifreeze reduce this to －22℃．
Alcohol is a kind of good antifreeze，but when the air is running it becomes hot and the alcohol boils away，so it must be changed very often．Most people use antifreeze that does not boil away when the engine is running．There are several chemicals that do this．One of the most popular is called ethylene glycol．
【小题1】people use ________ to keep car engines cool．