D．Most animals existing in the world are kept by humans now.

　　B　[段落大意题。第一句是本段的中心句，作者所要传达的中心意思是人类已经学会与诸多动物建立亲密的关系。]

　　2．Which of the following is NOT a domestic animal according to the passage?

　　A．A wolf kept in a zoo.

　　B．A cattle raised for farming.

　　C．A tiger performing in circus.

　　D．A fish living in the river.

　　D　[推理判断题。从第二段的内容可知，这样的动物不习惯自己四处寻找食物和住所，它们依赖主人给它们提供所需要的东西，并且当它们的需求得到满足之后，它们会很乐意做主人要求的事情，由此可推断A、B、C三项均符合这种动物的特点。故选D项。domestic"驯养的"。]

　　3．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 be wise about their feeding

　　C．not to allow it to take too big amounts of exercise

　　D．to join some sort of pet­keeping organizations

　　B　[推理判断题。结合文章最后两段的内容可知文中建议主人在喂养时应保持明智。]

　　4．Which of the following would be the best title for this passage?

　　A．Domesticated Animals - Man's Best Friends

　　B．Proper Diet for Healthy Animals

　　C．The Advantages of Raising Domestic Animals

　　D．Some Tips on Pet­keeping

　　A　[标题归纳题。第一段第一句是本文的中心句，下文都是围绕此句叙述如何与驯养动物处理好关系的，所以A项最具有概括性和针对性。]

IV.完形填空