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Do you know why different animals or insects have their special colors? Colors are used mainly to protect themselves.
Why can’t some birds easily catch locusts（蝗蟲）? 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 autumn comes, locusts change to the same brown color as crops have. Some other insects with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives in the day 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 can’t be easily seen by hunters. This is because they have the colors much like the trees.
Have you ever noticed an even more strange thing? A kind of fish in the sea can send out black liquid when it faces danger. While the liquid spreads over, its enemies can’t find it. And it quickly swims away. So it has lived up to now though it is not strong at all.
小題1: From the article we learn that locusts 　　　　　　　　　.
A．are dangerous to their enemiesB．are easily found by birds
C．change their colors to protect themselvesD．are small animals
小題2:How can insects with different colors from plants keep out of danger?
A．They have to move quietly.
B．They hide themselves in the day and appear at night.
C．They have the colors much like their enemies.
D．They run away quickly.
小題3: Bears and lions can keep safe because 　　　　　　　　　.
A．they live in forestsB．they like brown and grey colors
C．they move quietly　D．they have the colors similar to the trees
小題4:What does the word “l(fā)iquid” mean in the last paragraph?
A．氣體B．固體　C．液體　D．水蒸氣
小題5: Which is the best title for this passage?
A．The Main Use of Colors for Animals and Insects
B．Colors of Different Animals and Insects
C．The Change of Colors for Animals and Insects
D．The Change of Different Animals and Plants

小題1:C小題1:B小題1:D小題1:C小題1:C 

1.C 根據It is because locusts change their colors together with the change of the colors of crops可以知道蝗蟲通過改變顏色來讓自己不被發(fā)現，從而保護自己，故選C。
2.B 根據So they have to hide themselves for lives in the day and appear only at night.可知他們白天把自己隱藏起來，只在晚上出現，故選B。
3.D 根據because they have the colors much like the trees可知熊和獅子的顏色像樹的顏色，也就是說他們的顏色相似，選D。
4.C 本題是猜詞題，要聯系上下文來看。根據While the liquid spreads over, its enemies can’t find it可知能在水中擴散讓敵人不找不到他們的的是一種液體，也就是我們說的烏賊，選C。
5. C 主旨大意題的考查，文章主要講的是動物和昆蟲的顏色的改變，通過改變顏色他們能有效地保護自己，故C最佳。A,B只是文章提到了一個方面，D的植物變色文章未講到。
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