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, and 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.来源：恒星
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http://www.hxen.com Trained and tamed for many generations, domestic animals are not accustomed to roaming(到处走动) 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(倦怠的) 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.
1. What main idea does the author want to convey in the first paragraph?
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.
2. When an animal is underfed, it will probably ____.
A) refuse to obey its master
B) immediately fall ill
C) require its master to offer some food
D) seek for food on its own
3. Which of the following is NOT true of dogs according to the passage?
A) They can act as friends, guards, and servants to man.
B) They have great adaptation for the environment.
C) There live a great variety of breeds of dogs on the globe.
D) The Husky and the Saluki are the strongest breed ever known in the world.
4. To keep a domestic animal physically fit, its owner is advised ____.
A) not to hesitate to spend enormous amount of money on it
B) to pay attention to its proper feeding来源：
http://www.hxen.com C) not to allow it to take excessive amounts of exercise
D) to join some sort of pet-keeping organizations
5. Which of the following would be best TITLE for this passage?
A) Domesticated Animals - Man’s Best Friend
B) Proper Diet - the Road to Health
C) The Advantages of Raising Domestic Animals
D) Some Tips on Pet-keeping
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