Do you know why different animals or pests(害虫)have different colors? The colors are mainly used 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 the crops. When the crops are green，locusts look green．But as the harvest time comes，locus change to the same brown colors as the crops have．Some pests with different colors from the plants easily found and eaten by others．So they have to hide themselves，appearing only at night．

Some 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’．

    A kind of fish in the sea can send out a kind of black liquid(液体)when it faces danger．While the liquid spreads over，the fish’s enemies 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 can learn that locusts________．

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

    C．are dangerous for their enemies            D．can’t be easily caught by birds

2．How can pests with different colors from the plants keep out of danger?

    A．They run away quickly．

    B．They have the colors much like their enemies’．

    C．They hide themselves in the daytime and appear at night．

    D．They have to move quietly．

3．Some animals Can keep safe in the forest because________．

    A．they have the colors much like the trees’

    B．they move quietly

    C．they like brown and grey colors

    D．they live in the forest

4．Why can the kind offish in Paragraph4 live up to now(直到现在)?

    A．Because it is very large and strong．

    B．Because the liquid it sends out can help it escape when in danger．

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

    D．Because it swims very fast and Call escape very quickly．

5．Which is the best title for this passage?

    A．The Change of Colors．

    B．Colors of Different Animals and Pests．

    C．The Main Use of Colors with Animals and Pests．

    D．Some Animals and Pests．

　 Do you know why different animals or pests have their special colours? Colours in them seem to be used mainly to protect themselves.

　 Some birds like eating locusts(蝗虫), but birds can’t easily catch them. Why? It is because locusts change their colours together with the change of the colours of crops. When crops are green, locusts look green.But as the harvest time comes, locusts change to the same brown colour as crops have. Some other pests with different colours from plants are easily found and eaten by others. 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 colouring is to protect themselves. Bears, lions, and other animals move quietly through forests. They can’t be easily seen by hunters. This is because they have the colours much like the trees.

Have you ever noticed an even more strange 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 can’t 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 colours to protect themselves

2. How can pests with different colours from plants keep ou of danger?

A.They run away quickly　

B. They have the colours 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 colours much like the trees

B.they move quietly　 C.they like brown and gray colours

D.they live in forests

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

A. Because it is very 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 Colours for Animals and Pests

B. Colours of Different Animals and Pests

C. The Main Use of Colours for Animals and Pests

D. Some Animals and Pests

　　　　　　　　　　

Do you know why different animals or pests(有害物) 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．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 protecting themselves．Bears, lions and other animals move quietly through forests．They cannot be seen by hunters．This is because they have the colors much like the tree．

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 spread over，the enemies cannot find it．And it immediately swims away．So it has lived up to now though it isn't strong at all．

根据短文内容，指出能完成所给句子或回答所提问题的最佳答案。

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 colors much like their enemies．

C．They hide themselves in the day and appear at night．

D．They have to move quietly．

3．Bears and lions can keep safe because they             ．

A．have the colors much like the trees            B．move quickly

C．like brown and grey colors                       D．live in forests

4．The kind of fish live up to now because               ．

A．it is very big and strong

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

C．the liquid it sends out can kill its enemies

D．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

阅读理解.

　　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. 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 more strange 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 big and strong.

B．Because the liquid 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

阅读理解.

　　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. 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 more strange 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 big and strong.

B．Because the liquid 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