Do you know why different animals or pests(昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves.

　　Some birds like eating locusts(蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.

　　If you study the animal life, you'll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters(猎人). This is because they have the colors much like the trees.

　　Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger. While the liquid spreads over(散开), its enemies(敌人) cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.

 (    )46．How can pests with different colors from plants keep out of danger?

　　A. They run away quickly.

　　B. They have the colors much like their enemies.

　　C. They hide themselves by day and appear at night.

　　D. They have to move quietly.

(    )47．Bears and lions can keep safe because______.

　　A. they have the colors much like the trees　　 B. they move quietly

　　C. they like brown and gray colors       　　D. they live in forests

 (    )48．Which is the best title for this passage?

　　A. The Change of Colors for Animals and Pests

　　B. Colors of Different Animals and Pests

　　C. The Main Use of Colors for Animals and Pests

　　D. Some Animals and Pests

Animals have the power to make themselves understood by man，especially when they are in serious danger and wish man to help them．And they often unite to help one another．1 was on a sheep farm in North America once when one of the sheep came crying to the tent（帐篷） late in the afternoon．She made the most painful cries．My friend，whom 1 was visiting，told me that something was wrong．

    Together we followed the sheep back to where she had been eating grass on the farm．She Rushed（冲）forward and kept on looking back to see if we were coming．She finally led us to an old well （水井）and we heard the sad voice of her young baby that had fallen into the well．As the well had no water in it and was only six feet deep．We got a ladder and in a few minutes the baby went back to its mother. She seemed very, happy at the successful outcome（结果）of the accident．She had had come and told US her trouble and got help．

（   ）1．In the stop the writer “I”was

       A．the owner of a sheep farm

       B．a visitor of a sheep farm

       C．feeding sheep on a farm in North America

    D．helping one of his friends to look after the sheep

（   ）2．What did the sheep come to the tent for one day?

       A．For help．      B．For food       C．For water    D．For its friend．

（   ）3．How did the farmer know that something was wrong?

      A．By talking to the mother sheep．              B．In a strange way．

      C．By thinking about it together with Iris friend．   D．According to his experience．

（   ）4．What happened to her baby?

      A．There was no water for it．      B．There was not food for it．

      C．It was hurt and lay in the well     D．It fell into the well and could not come out of it

（   ）5．Which of the following statements is not true according to the passage?

      A．Animals have the power to make themselves understood by man。

      B．Animals understood man．

      C．Animals often help one another especially in danger．

D．Animals wish man to help them in serious danger．

    Do you know why different animals or pests have their special colors?    1  .

    Some birds like eating locusts，but birds cannot easily catch them．Why?  2   When crops are green，locusts look green．But as the harvest time comes，locusts change to the same brown color as crops have．  3  So they are to hide themselves for lives and appear only at night．

    If you study the animal life，you’ll find the main use of coloring is to protect themselves. Bears，lions and other animals move quietly through forests．They cannot be easily seen by hunters．  4  

Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid when it faces danger．While the liquid spreads over，its enemies cannot find it．  5  So it has lived up to now though it is not strong at all．

阅读理解(Reading comprehension)

阅读下面短文，按要求完成文后各题。

　　Most animals protect (保护) their young until they are old enough to take care of themselves. A fish that swims in the rivers of South America protects its young in a very strange way. This fish, a kind of catfish, uses its mouth to keep its babies from danger.

　　When this catfish lays (产卵) its eggs, it carries them in its mouth. From what we know, it does not eat during this time. After the eggs hatch (孵化), the fish swims with its young to protect them. It opens its mouth when danger appears (出现), and the tiny (极小的) fish swim inside. They swim out only when it is safe again.

　　These catfish may have a peculiar way to protect their young, but it seems (好像) to work.

Choose the best answer.

1．The best title is ________.

[　　]

A．Staying Away From Danger

B．How A Fish Protects Its Young

C．Laying Eggs

D．A Cat That Swims

2．The catfish in the story live in ________.

[　　]

3．The young fish are ________.

[　　]

4．If the young fish were not near their parents, they would be ________.

[　　]

5．The word“peculiar”in line eight means ________.

[　　]