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A remarkable variety of insects live on this planet. Insects have survived on earth for more than 300 million years, and may possess the ability to survive for millions more.

Insects can be found almost everywhere—on the highest mountains, in the cold South Pole and in bubbling hot springs. They dig through the ground, jump and sing in the trees, and run and dance in the air. They come in many different colors and various shapes. Insects are extremely useful to humans,pollinating (授粉) our crops as well as flowers in meadows,forests, deserts and other areas. But some insects, such as mosquitoes and fleas, can transmit disease.

There are many reasons why insects are so successful at surviving. Their amazing ability to adapt permits them to live in extreme ranges of temperatures and environments. They can survive on a wide range of natural and artificial foods - paint, books, grain, plants and animals. Because they are small, they can hide in tiny spaces.

A strong, hard but flexible shell covers their soft organs and is resistant to chemicals, water and physical impact. Their wings give them the option of flying away from dangerous situations or toward food or mates. Also, insects have an enormous reproductive capacity: An African ant queen can lay as many as 43,000 eggs a day.

Another reason for their success is the strategy of protective color. An insect may be right before our eyes, but nearly invisible because it is cleverly disguised (伪装) like a green leaf, lump of brown soil, a seed or some other natural object. Some insects use bright, bold colors to send warning signals that they taste bad. Others have wing patterns that look like the eyes of a huge predator, confusing their enemies.

1.What does the underlined word “transmit” in Paragraph 2 mean?

A.cure. B.catch.

C.prevent. D.spread.

2.How can the insects protect themselves from chemicals?

A.Have a strong shell. B.Fly away when necessary.

C.Hide in tiny spaces. D.Change colors or shapes.

3.Why do some insects disguise like natural objects?

A.To look bad—tasting. B.To send warning signals.

C.To avoid being discovered. D.To frighten away their enemies.

4.What’s the main idea of this text?

A.How insects survive in different places.

B.Why insects can survive so successfully.

C.What insects can do to the environment.

D.Where insects can be found in quantity.

高二英语阅读理解中等难度题

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