(用括号中所给词的适当形式填空) Why don't you watch them __________(careful)?

Scientist Without Laboratories
When you hear the word “scitentist”, what do you think of? Many people think scientist are people in clean white coats who work in labs. And some scientists do work in labs. But there are1scientist who work in woods and jungles. These scientists are called “animal behavior (行为) scientists”, and they study animals as they live in nature.
Why don’t these scientists catch animals and study them in zoos? The2is in the word “behavior”. Animals behavior scientists want to learn3animal behave in their wild homes. When animals live in cages (笼子) or in zoos, they do not act the same as they do when they are4. They may fight5each other, or they may not eat, or they may not raise (抚养) their babies as they usually would. To see real animal behavior, scitentists must go where the animals6.
So animal behavior scientists go into the jungles, the woods or the desert. There , their most important7are their eyes and ears. They watch and listen to the animals very8. They write down everything that happened in notebook.9
they live near the animals, the scientists are careful not to frighten them. If the scientists are luncky, the animals will10no attention to them. Then the scientists can see how the animals really live.
The behavior scientists hope what they’ve learned about animal behavoir can provide clues (提供线索) to help people learn to live together more happily.

1. 1.
   1. A.
      another
   2. B.
      other
   3. C.
      others
   4. D.
      the other
2. 2.
   1. A.
      answer
   2. B.
      question
   3. C.
      problem
   4. D.
      text
3. 3.
   1. A.
      when
   2. B.
      where
   3. C.
      how
   4. D.
      why
4. 4.
   1. A.
      happy
   2. B.
      free
   3. C.
      sad
   4. D.
      angry
5. 5.
   1. A.
      of
   2. B.
      among
   3. C.
      for
   4. D.
      with
6. 6.
   1. A.
      live
   2. B.
      run
   3. C.
      play
   4. D.
      eat
7. 7.
   1. A.
      machines
   2. B.
      tools
   3. C.
      thoughts
   4. D.
      ways
8. 8.
   1. A.
      truly
   2. B.
      carefully
   3. C.
      woderfully
   4. D.
      nicely
9. 9.
   1. A.
      But
   2. B.
      Unless
   3. C.
      Though
   4. D.
      As if
10. 10.
    1. A.
       pay
    2. B.
       spend
    3. C.
       take
    4. D.
       cost

完型填空.

阅读下面短文，掌握其大意，然后选出最佳答案，完成短文.

　　Once there（1）________ an old man in a town, he always（2）________ a lot of things, so his wife always had to say to him, "Don't forget this."

　　One day he went on a（3）________ way, before he left home, his wife said, "Now you packed all these things, you need them（4）________ your way, take（5）________ of your things on the way." He went to the station. He bought a ticket and got on the train（6）________ it.

　　About an hour（7）________, the conductor began to（8）________ the tickets. He came to the old man and said, "Will you please（9）________ me your ticket?" The old man looked for the ticket in all his tickets（10）________ he couldn't find it. He was very（11）________"I can't find my ticket. I really bought one before I got on the train." said the old man.

　　"I think you are right, I believe you. You don't have to buy（12）________ ticket." said the conductor. But the old man（13）________ looked worried and said sadly, "You don't know（14）________ I'm worried, if I don't find my ticket, I can't remember the station（15）________ I am going. "

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