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    In nature, you may see many insects and animals of different colors. Have you ever wondered why?
    Locusts （蝗虫）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（敌人）. 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 （蝴蝶）and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil 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（行为）? 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 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.
    小题1: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.
    小题2:What’s the meaning of the underlined word “survive” in the passage?
    A．繁殖B．产卵C．觅食D．生存
    小题3:What is the main idea of this passage?
    A．Some insects and animals have different skills.
    B．Some insects and animals are cleverer 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.

    小题1:A
    小题2:D
    小题3:C

    试题分析：自然界有许多昆虫和动物都有不同的颜色。本文以蝗虫、棕熊、老虎、北极熊、蝴蝶和土壤昆虫为例叙述了动物的保护色，并且介绍了墨鱼保护自己的方式。
    小题1:细节理解题。根据 “Soil insects are mostly dark-colored”可知土壤昆虫大多数颜色不明亮。故选A。
    小题2:词义猜测题。根据后半句 “they have to hide themselves in the daytime and appear only at night.”他们白天隐藏起来晚上出现，可知这是为了不被发现而吃掉，也就是为了生存。故选D。
    小题3:主旨大意题。根据本文主要叙述的是昆虫和动物的保护色，可知选C。
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