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  3. Of the thousands of different kinds of animals that exist in the world man has learned to make friends with an enormous number.

Of the thousands of different kinds of animals that exist in the world man has learned to make friends with an enormous number.

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问题    Of the thousands of different kinds of animals that exist in the world man has learned to make friends with an enormous number. Some are pets, which offer him companionship; some give protection, and some do hard work which man cannot do for himself. Dogs, which serve man in all three capacities, are found in various breeds in all countries of the world. The Husky can live in the cold polar regions, and the Saluki is at home in the hottest parts of Central Africa. The inhabitants of certain countries are dependent for their very lives on the camel. In the West Indies the little donkey, strong and sure-footed, carrying heavy loads even in mountainous places, is a familiar sight.
   Trained and tamed for many generations, domestic animals are not accustomed to roaming in search of food and shelter. They look to their masters to provide for their needs, and as long as these are supplied, they are content to do what their masters require.
   All domestic animals need proper food. It must be suitable for them, sufficient in quantity, fresh and clean. Some people feed a pet dog or cat on odds and ends of table scraps, and then wonder why the animal seems listless and dull. The quantity of food depends on the size of the animal and the amount of exercise it takes. Overfeeding is as bad as underfeeding. Containers for food and water must be washed regularly if the animal is to maintain good health.
   Even well cared for animals may sometimes fall ill. If this happens, the wise master seeks the best advice he can get. All sorts of medicines and treatments are available for sick animals, and in some countries organizations exist to provide them free or at a cheap price. Useful, friendly, hardworking animals deserve to have some time, money and attention spent on their health.
What main idea does the author want to convey in the first paragraph?
选项 A、There exists thousands of species of animals in the world.
B、Man came to establish a close relationship with a number of animals.
C、In some regions a donkey seems to be a very useful beast.
D、An animal will be useless unless domesticated.
答案B
解析 根据文中第一段的“Of the thousands of different kinds of animals that exist in the world man has learned to make friends with an enormous number．”可知，世界上现存的动物种类成千上万，人类和其中很大一部分成为了朋友。后面几段又说人类在受到动物帮助的同时，也要学会照顾好动物，注意动物的饮食。据此可知，B项正确。
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