Choose the words or expressions and complete the passage (选择最恰当的单词或词语，完成短文)
1．We have always been warned of the dangers of the forest fires. They cause     1   to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be     2    for a forest?
2．People start some of the fires with special reasons to actually do well to the eco-system.
3．In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can       3      some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place.
4．Some trees even need fires to grow. These trees hold their seeds(种子) inside. Heats from a fire allow the coat of the seeds to open up. Then the seeds fall to the ground and have the 4 to grow.
5．Scientists, who know about nature’s needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or 5   a large space of the forest. Fires can be dangerous for animals. Even when animals continue to live after forest fires, they can go hungry   6    their food has been damaged in the fire. Small, controlled fires mean that animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This   7 makes an eco-system.
6．So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever.

Choose the words or expressions and complete the passage (选择最恰当的单词或词语，完成短文)
1.We have always been warned of the dangers of the forest fires. They cause1to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be2for a forest?
2.People start some of the fires with special reasons to actually do well to the eco-system.
3.In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can3some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place.
4.Some trees even need fires to grow. These trees hold their seeds(种子) inside. Heats from a fire allow the coat of the seeds to open up. Then the seeds fall to the ground and have the4to grow.
5.Scientists, who know about nature’s needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or5a large space of the forest. Fires can be dangerous for animals. Even when animals continue to live after forest fires, they can go hungry6their food has been damaged in the fire. Small, controlled fires mean that animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This7makes an eco-system.
6.So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever.

1. 1.
   1. A.
      illness
   2. B.
      difficulty
   3. C.
      damage
   4. D.
      flood
2. 2.
   1. A.
      helpful
   2. B.
      powerful
   3. C.
      harmful
   4. D.
      awful
3. 3.
   1. A.
      take the place of
   2. B.
      get ready for
   3. C.
      be bad for
   4. D.
      get rid of
4. 4.
   1. A.
      time
   2. B.
      water
   3. C.
      chance
   4. D.
      skill
5. 5.
   1. A.
      discover
   2. B.
      cover
   3. C.
      but
   4. D.
      waste
6. 6.
   1. A.
      because
   2. B.
      although
   3. C.
      but
   4. D.
      so
7. 7.
   1. A.
      almost
   2. B.
      again
   3. C.
      never
   4. D.
      even

Choose the words or expressions and complete the passage(选择最恰当的单词或词语完成短文)：

    When I was fifteen I went to a summer camp．There were lots of great   1  but there was one thing I was really scared(害怕)about：climbing the wall．

    The wall is a kind of rock that people use to learn how to climb．It is very tall．We were all supposed to chimb the wall，but I knew I couldn’t get to the top because I am  2    heights．I was ashamed and I didn’t want anyone to know that I was scared．I thought they would all laugh at me．I practiced my excuse：“I’m not scared，you know．I suffer from vertigo(患眩晕症)．”

    The day came．It was time to climb the wall．The sun was shining but everyone was very quiet that morning．I took photographs at the bottom of the wall and tried to 3  ．Everyone in the group went up．Then the moment came．It was my turn．I was so scared that all I could think about was my excuse．Someone said．“Shall I take your camera？”and I answered．“I’m not scared，you know．I suffer from vertigo.”The  4  was that I was more than scared , I was terrified(吓坏了)．The camp leader said，“Don’t worry，you don’t have to do anything you don’t want to do．”I was surprised．Everyone was understanding．No one  5  ．

    The next day，the leader asked me if I wanted to try the wall on my own．6  the others watching．Although I was still very nervous，I agreed and climbed slowly to the top with his help．I was still shaking when I came 7 ，but I was really happy and relieved too．For me，climbing the wall was a real achievement．

  1．A．activities       B．operations       C．accidents            D．exams

  2．A．poor at         B．good at        C．afraid of       D．fond of

  3．A．go           B．hide           C．appear         D．run

  4．A．truth           B．situation         C．story           D．reason

  5．A．jumped         B．cheered         C．smiled          D．1aughed

  6．A．with           B．without      C．among         D．behind

  7．A．in            B．out            C．up               D．down

Choose the words or expressions and complete the passage(选择最恰当的单词或词语，完成短文，用A、B、C或D表示)

　　I stopped by Mr. J. Gerald Cowcamper's house one day and was greeted by a rather old-looking dog. She was a gentle beast who wagged her tail as she pushed her nose against my hand.

　　“What's her 　　1　　?” I asked.

　　“I call her ‘Dog Face’,” replied the old 　　2　　.

　　“　　3　　 do you call her that?” I inquired.

　　“Isn't it obvious(明摆着的)?” asked Mr. Cowcamper.

　　“Not really.”

　　Mr. Cowcamper raised the old animal's head. “If you 　　4　　 at her carefully, you can see that she seems to have a dog's face,” he explained.

　　“But she is a 　　5　　!” I said.

　　“Shhhh!” Mr. Cowcamper responded with the loudest whisper(悄悄话) I have ever heard. “Don't let her hear you say that!”

　　I said 　　6　　, because I didn't know what to say.

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Choose the words or expressions and complete the passage(选择最恰当的单词或词语，完成短文。用A、B、C或D表示)

Which of your hands do you use more often? Very 　　1　　 of us can use both of our hands equally(同样地) well. Most of us are right-handed. Only about five people out of a hundred are left handed. New-born babies can hold things 　　2　　 either of their hands, but in about two years they usually 　　3　　 to use their right hands. Scientists do not know why this happens. They thought that we inherited(遗传) from our animal ancestors(祖先), but this may not be 　　4　　. Because scientists have found that monkeys prefer to use one of their hands more than the other, … but it can be 　　5　　 hand. There are as many right-handed monkeys as there are left-handed ones. Next time you visit the zoo, you'll see that some of them will use their left hands. But most people use their right hands better and this 　　6　　 life difficult for the left-handed people. We live in a right-handed world.

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Choose the words or expressions and complete the passage(选择最恰当的单词或词语，完成短文。用A、B、C或D表示)

　　What is blood? It is the red liquid which comes out of your finger where you cut it.

　　There are about thirteen pints(品脱) of blood in a man's body. He can 　　1　　 a pint of blood at a time to the blood bank for the use of other people who may need it. A healthy body makes up the pint of blood quickly.

　　What does blood do for us? It 　　2　　 food to all parts of our bodies and takes waste away from them. All parts of our bodies are made up of cells(细胞). These cells, which are very small, all need food all the time. No one 　　3　　 cells before the invention of microscope(显微镜). Before then no one could make pictures of cells because no one could see them.

　　What makes the blood move round the body? The heart sends it round. 　　4　　 man's heart is the size of his shut hand.

　　The heart is a pump(泵). It pumps blood and sends it round the body. The heart has four rooms with doors between them. It pumps blood in and out 5these doors by changing the size of the rooms so that the doors open and shut. The heart keeps a stream(一股) of blood 　　6　　 all round the body and back again to itself. The heart is a very important part of one's body. When it stops beating, one will die very soon.

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