Question

    In nature,you may see many insects (昆虫) and animals of different colors. Have you ever won-dered why?

      Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them. It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops (庄稼). When crops are young,locusts look green. But when autumn comes,locusts change to the yellow and brown color as crops do.

    Brown bears,tigers and other animals move quietly through forests. They can't be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason,polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil (土壤) in a dark and wet environment. However,insects with colors different from plants can easily be found and eaten by others. So in order to survive,they have to hide themselves in the daytime and appear only at night.

    Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over,its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

() 1. It is not easy for birds to catch locusts because .

   A. locusts are good runners   B. locusts can jump very high

   C. locusts are smarter than birds   D. locusts can change their colors

() 2. According to the passage,most soil insects .

   A. do not have bright colors   B. change their colors with the soil

   C. do not live in a dark and wet environment   D. eat colorful insects like butterflies and bees

() 3. What's the meaning of the underlined word “survive” in the passage?

   A. 繁殖   B. 产卵   C. 觅食   D. 生存

() 4. The ink fish so that its enemies will not see it.

   A. changes its color   B. makes the water around it black

   C. appears only at night   D. hides itself in the sea rocks

() 5. What is the main idea of this passage?

   A. Some insects and animals have different skills.

   B. Some insects and animals are clever than we think.

   C. Some insects and animals use colors to protect themselves.

   D. Some insects and animals can get used to the environment easily.

Answer 1

1. D 2. A 3. D 4. B 5. C

[解析]这篇短文中作者主要介绍了一些动物如何利用颜色来保护自己的方式。

1. D 根据第二段 Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them-- The reason is that the colors of lo-custs change with the colors of crops (庄稼).及下文描述，可知鸟类不易捉住昆虫是因为它们能够 随着庄稼而改变它们自身的颜色。故选D.

2. A 根据第三段 Soil insects are mostly dark-col-ored and they live under the soil(土壤)in a dark and wet environment.描述，可知生活在土壤里面 的昆虫没有明亮的颜色。故选A.

3. D 联系下文…they have to hide themselves in the daytime and appear only at night.描述，可知此处 指的是为了生存。故选D.

4. B根据短文最后一段描述，可知墨鱼能够能够喷 出一种墨水，让它周围水的颜色变黑来保护自己。 故选B.

5. C这篇主要介绍了一些动物依靠自身颜色来保 护自己的生存方式。故选C.