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.

36. From the passage we learn that locusts________.

A. are small animals                  B. are easily found by birds

C. are dangerous to their enemies    D. change their colors to protect themselves

37. 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.

38. 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

39. Why can the kind of fish live up to now?

A. Because it is very and strong.     

B. Because the liquid it sends out can help it escape from its enemies.

C. Because the liquid it sends out can kill its enemies.

D. Because it swims faster than any other fish.

40. 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

When I was young， my father used to grow carnations (康乃馨).His carnations were red， pink and white. Everyone who saw them admired them for their beauty.
He took care of them with so much love and   　36　    . Every day he came home from work， he went   straight    to see them. He 　37　 watching them every day. We the kids did too. But he used to tell us， “No one should touch my flowers.”
One day my younger sister， who loved my dad very much， had wanted to help him and she   　38　     the carnations from their stems (枝干) one by one and arranged them  　39　      . She believed that he would be very   　40　    to see them that way.
When mom and I realized what my sister had done， we became completely hopeless. However， my sister had no idea why no one showed her any appreciation. When my dad arrived he went，　41　， straight to see the flowers. When he saw his flowers    lying     on the floor like dead animals， he was 　42　 at first. He looked towards the street， to see if it was any of the  　43　    children who could have done it. Then he entered the living room and looked at mom in silence.
Finally mom， who always taught us to   　44　    no matter what， looked at dad and said： “We have no bad neighbors in our area”. Then with a nice tone she continued： “No outsider did this great job， only your lovely daughter Clémence.” My dad’s face   changed     into 　45　 and then he said： “Do I have a better   　46　     than my lovely daughter？” My younger sister smiled and  　47　    dad tightly.

The primate brain is larger than 　　 of other animals.

A.those　　　　　B.what　　　　　C.this　　　　　D.that