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Do you know why different animals or pests have their special colors? Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts. 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 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 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.
根據短文內容, 指出能完成所給句子或回答所提問題的最佳答案。
小題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

小題2: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

小題3: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

小題4: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

小題1:D
小題2:A
小題3:B
小題4:C

試題分析：這篇文章講述了不同的動物和害蟲都會有著和環境相似的顏色，這些顏色主要是用來保護它們自己不受到傷害。
小題1:細節題。根據文章Some birds like eating locusts. but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops.蝗蟲能夠隨著農作物的顏色的變化而改變自己的顏色，這樣就可以保護自己不被鳥類吃掉。故選D
小題2:細節題。根據文章This is because they have the colors much like the tree.可知，那是因為熊和獅子有著和樹木很想象的顏色。故選A
小題3:細節題。根據文章A kind of fish in the sea can send out a kind of very black liquid when it faces danger.有一種魚當它遇到危險是，就會發射出一種黑色的液體。故選B
小題4:主旨題。這篇文章講述了不同的動物和害蟲都有著自己特殊的顏色，這些顏色主要就是用來保護自己遠離危險。故本題選C
點評：本文的思路清晰，結構明確。首先對作者所說明的事物進行理解。本文細節題很多，對于細節題，學生在理解全文的基礎上要對題目中關鍵字在文章中迅速定位，找到相對應的出處，答題比較備選答案的區別及和文章信息最相關的是哪個，即那個就為正確答案。

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