摘要: The a is very popular. Everyone likes her. Ⅴ.用括号里所给单词的适当形式填空(每 小题0.5分.满分5分)

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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.

1.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

2.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.

3.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

4.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.

5.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

 

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We’ve talked about snails (蜗牛) and their slow move. But much of the time snails don’t move at all. They are in their shells (壳) —sleeping.

Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into his shell. A snail will die in a heavy rain. So when it rains, a snail does the same thing, too. A snail can sleep for as long as it needs to. It spends all the winter months in its shell, asleep.

In the spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry, the snail looks for food. Its eyes, at the end of the top feelers (触角), are very weak. But its sense (感觉) of smell is very strong. It helps the snail to find food and the new greens.

A snail’s mouth is no bigger than the point of a pin (大头针). Yet it has 256,000 teeth! The teeth are very small, and you can’t see them. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out its teeth, it will grow new ones.

1. A snail _________.

  A. moves more slowly at night  B. has thousands of feet

C. doesn’t move at all           D. sleeps much of the time

2. In the sentence “A snail draws its body into its shell”, the word “draw” means _____.

  A. to make with a pencil     B. to push  C. to pull      D. to move away

3. From the story, we know _________.

  A. a snail’s shell is very thin     B. a snail can’t see well

  C. a snail’s nose is quite short    D. a snail’s body changes in different seasons

4. A snail goes to sleep when _____.

  A. it feels hungry   B. it is put into a paper box  C. spring is coming   D. it rains heavily

5.Which of the following is wrong?

A. In winter the snail doesn’t eat or move.  B. A snail doesn’t like living under the sun

C. The snail’s teeth can’t be worn out.       D. The snail’s nose helps to find food.

 

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