Even if  you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

   You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you. 来源：

   Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around. 来源：

   Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape (逃出) the earth’s gravity and carry you into space. 来源：

In this passage, the word “gravity” means_______.来源：

   A. the pull of everything.           B. the force of attraction(吸引) among objects.

   C. the force which attracts objects towards the centre of the earth来源：

   D. the force which attracts the earth towards the sun.

When you slip(滑) you always fall to the ground because________来源：

   A. the earth always turns round.                   B. the earth has gravity

   C. the earth’s gravity is greater than your weight.     D. you are careless. 来源：

Gravity is strong that_______

   A. it can throw a ball into the air.           B. it makes you jump only seven feet.

   C. it can let you fly away from the earth.     D. it can keep everything on earth.

Because of gravity,________

   A. water flows everything.            B. we can go everywhere by ship. 来源：

   C. water always flows downwards.     D. fish can live in water.

We can get away from the earth by spaceship because________

   A. the spaceship goes very fast.       B. the earth can’t pull the spaceship.

C. the spaceship has a strong force.    D. the spaceship can jump higher than others.

Even if you are an experienced backpacker or climber，you need to know what to do if something goes wrong.It is not that Alaska is that much more dangerous than other places.It is no more hazardous than elsewhere，as long as the proper precautions(预防措施)are taken.So, being prepared is crucial to ensure a safe trip.
First of all，make sure you pack everything you will need for your trip.Even if you are traveling by car，pack clothes and gear for backpacking.Because of the bad weather, cars break down frequently. Pack a survival(生存)kit full with：a down coat, boots ,mittens, a hat, snow-pants，sleeping bags，candles，a flashlight，and high-energy food. If you are traveling by car , also pack extra belts, a shovel, and a chain.
If you are camping or hiking，make sure you know how to avoid bears.If you are lost in the wilderness, there is no doubt you will encounter them.
However，there is no need to be nervous.Just take these precautions：make noise as you walk，bears will avoid you；cook your food away from where you sleep，and store your food away from where you sleep，so the bears are not attracted.Both of these should keep the bear away.However，if you do encounter a bear，there are two different schools of thought.One is to make noise and scare the bear away.The other is to stand still and speak softly to get the bear to leave.If you are dealing with a brown bear，you can climb a tree，since it cannot follow.But，black bears can climb.If for some reason the bear attacks，play dead.Try to protect your head and neck，and hopefully the bear will leave its“dead” prey.

1. 1.

   The underlined word “hazardous” in Paragraph l most probably means________.

   1. A.
      interesting
   2. B.
      dangerous
   3. C.
      wonderful
   4. D.
      important
2. 2.

   The author seems to tell us in Paragraph 2 that________.

   1. A.
      it is more dangerous to travel by car
   2. B.
      the weather is always bad while traveling
   3. C.
      it is necessary to take whatever you need
   4. D.
      the car breaks down often while traveling
3. 3.

   Yon should prepare your food away from where you sleep so that________.

   1. A.
      the bear can’t find you by the smell of the food
   2. B.
      you can have a better sleep at night
   3. C.
      the bear can’t find out your food easily
   4. D.
      you can protect the food you bring with you
4. 4.

   All the following can most probably protect you EXCEPT that________.

   1. A.
      you can try to make noise as possible as you can
   2. B.
      you can say something in a soft voice to the bear
   3. C.
      you can try to learn to climb up a tall tree nearby
   4. D.
      you can pretend to be dead when you are in danger
5. 5.

   Which of the following is the main idea of this passage?

   1. A.
      There are some tips to survive in Alaska’s wilderness.
   2. B.
      The bears in Alaska’s wilderness are very dangerous.
   3. C.
      Something should be taken along while traveling by car.
   4. D.
      You should learn how to protect yourself.

                                           B

As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things.

    Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight, Very often the effects of pollution are not noticed for many months or years because the first organisms（生物体）to be affected are either plants or plankton(浮游生物). But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it’s not until dead fish and water birds are seen at the river’s edge or on the seashore that people realize what is happening.

　　Where do the substances which pollute the water come from? There are two main sources of sewage（下水道污物）and industrial waste. As more detergent（洗涤剂）is used in the home, so more of it is finally put into our rivers, lakes and seas. Detergents harm water birds, dissolving the natural substances which keep their feathers water-proof (防水). Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful as there are many highly poisonous things in it, such as copper and lead.

　　So, if we want to stop this pollution, the answer is simple: sewage and industrial waste must be made clear before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.

70. Pollution of water is noticed________.

　　A. when the first organisms are affected　     

B. when a good many fish and birds die

　　C. when poisonous things are poured into water　

D. as soon as the balance of nature is destroyed

71.The living things die because there is no ________in the lake or river.

　　A. water　　　　　            B. fish            　 C. poison　　　　　   D. oxygen

72. Which of the following is harmful according to the passage?

　　A. Organisms               　B. Plants and plankton in the water

　　C. Waste water from cleaning    D. Industrial waste made clear before flowing into the water

73. The way to stop water pollution is to________.

　　A. realize the serious situation clearly

　　B. put oxygen into the river

　　C. make the waste material harmless before flowing into the water

　　D. make special room in the sea for our rubbish

Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

　 You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.

　 Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around.

　 Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape (逃出) the earth’s gravity and carry you into space.

1. In this passage, the word “gravity” means_______.

　 A. the pull of everything.　　　　　 B. the force of attraction(吸引) among objects.

　 C. the force which attracts objects towards the centre of the earth

　 D. the force which attracts the earth towards the sun.

2. When you slip(滑) you always fall to the ground because________

　 A. the earth always turns round.　　　　　　　　　 B. the earth has gravity

　 C. the earth’s gravity is greater than your weight.　　 D. you are careless.

3. Gravity is strong that_______

　 A. it can throw a ball into the air.　　　　　 B. it makes you jump only seven feet.

　 C. it can let you fly away from the earth.　　 D. it can keep everything on earth.

4. Because of gravity,________

　 A. water flows everything.　　　　　 B. we can go everywhere by ship.

　 C. water always flows downwards.　　 D. fish can live in water.

5. We can get away from the earth by spaceship because________

　 A. the spaceship goes very fast.　　　 B. the earth can’t pull the spaceship.

C. the spaceship has a strong force.　 D. the spaceship can jump higher than others.

A week ago, I had the great pleasure of reading an e-book, When Money Talks, Listen! By Rich Ezzo．It took only about an hour to read.

   When I first received a copy, I thought it was a Get Rich Quick type of publication．Nothing is wrong with Get Rich Quick, but my mind just doesn’t chase after dreams of wealth．I think that if God ever wants me to be rich, he knows where to find my purse.

   When I began reading When Money Talks, Listen!, I was overjoyed to find that Rich Ezzo isn’t money hungry either．He, too, is hungry far more important than money．

Since I love this e-book so much, why wait a week to write the review? Simple．I wanted to see if the effect it had on me was a keeper．After reading the last word of the e-book, I totally agreed with the subtitle which promised to forever change the way we thought about money．I had so many thoughts running around my mind that I had to install(安装) a stoplight to stop some while others made their way into the picture, then I yielded(让路) them as a few ones arrived in town．I had a mental traffic jam, which only goes to show how slow the traffic usually is．

   It has been a week and the effect is the same．I truly do look at money differently and have even done a few things differently this week．This is an e-book you’ll want to read, I promise．I often recommend books to my daughter, and this is one that I didn’t just “suggest”---I left it open at the bottom of the computer and told each one, “Read it, you’ll love it.”

   I would never point someone in a direction I wouldn’t go myself．I urge you to visit the author’s website, Myster Money, and to download the e-book．You won’t regret it.

The author wrote this passage to _________　

       A．strongly recommend an e-book.

　    B．show the author's attitude to money.

　    C．introduce the general idea of an e-book.

　    D．point out Rich Ezzo isn't money hungry.

According to the passage, a Get Rich Quick type of publication ______.

       A．is what the author really cares for

       B．deals with how to make money

       C．is also an e-book written by Rich Ezzo

       D．is more popular than e-books

The author didn't write the review as soon as he finished reading the book because________．

　    A．he was too excited to write anything

　    B．he was not sure whether he did well

　    C．he had to wait for Rich Ezzo's permission

　    D．he wondered if the book would have long influence on him

By saying the underlined sentence in Paragraph 4, the author probably __________.

　    A．shows that the book brought him many new thoughts

　    B．shows how bad the traffic is in town

　    C．describes the difficulty in understanding the book

　    D．explains it's hard to change one's attitude to money

Which of the following is supported by the passage?

      A．The author had known Rich Ezzo before.

　    B．The author hasn't dreamed of getting rich immediately.

　    C．The author always prefers e-books to paper books.

　    D．The author likes Get Rich Quick-type of publications.