导读：主题句的考查是英语阅读理解题经常涉及的一大考点，主题句一般出现在文章的开头和结尾。主题句往往对全文起提示、启迪、概括、归纳之作用，主旨大意题，归纳概括题，中心思想题往往直接可从主题句中找到答案。以下是一篇科普知识类阅读理解训练题，供学生练习。

　　Can dogs and cats live in perfect harmony in the same home? People who are thinking about adopting a dog as a friend for their cats are worried that they will fight. A recent research has found a new recipe of success. According to the study, if the cat is adopted before the dog, and if they are introduced when still young (less than 6 months for cats, a year for dogs), it is highly probable that the two pets will get along swimmingly. Two-thirds of the homes interviewed reported a positive relationship between their cat and dog.

　　However, it wasn’t all sweetness and light. There was a reported coldness between the cat and dog in 25% of the homes, while agGREssion and fighting were observed in 10% of the homes. One reason for this is probably that some of their body signals were just opposite. For example, when a cat turns its head away it signals agGREssion, while a dog doing the same signals submission.

　　In homes with cats and dogs living peacefully, researchers observed a surprising behaviour. They are learning how to talk each other’s language. It is a surprise that cats can learn how to talk ‘dog’, and dogs can learn how to talk ‘Cat’.

　　What’s interesting is that both cats and dogs have appeared to develop their intelligence. They can learn to read each other’s body signals, suggesting that the two may have more in common than was preciously suspected. Once familiar with each other’s presence and body language, cats and dogs can play together, GREet each other nose to nose, and enjoy sleeping together in the sofa. They can easily share the same water bowl and in some cases groom(梳理) each other.

　　The significance of this research on cats and dogs may go beyond pets----to people who don’t get along, including neighbors, colleagues at work, and even world superpowers. If cats and dogs can learn to get along, surely people have a good chance.

　　31. The underlined word swimmingly in paragraph1 is closest in meaning to______.

　　A. early B.sweetly C.quickly D. smoothly

　　32. Some cats and dogs may fight when_________.

　　A. they are cold to each other

　　B. they look away from each other

　　C. they misunderstand each other’s signals

　　D. they are introduced at an early age

　　33. What is found surprising about cats and dogs?

　　A. They eat and sleep together

　　B. They observe each other’s behaviors

　　C. They learn to speak each other’s language

　　D. They know something from each other’s voice

　　34. It is suggested in paragraph 4 that cats and dogs_______.

　　A. have common interests

　　B. are less different than was thought

　　C. have a common body langage

　　D. are less intelligent than was expected

　　35. What can we human beings learn from cats and dogs?

　　A. We should learn to live in harmony

　　B. We should knows more about animals

　　C. We should live in peace with animals

　　D. We should learn more body languages

　　【答案解析】

　　本文是一篇说明文。通过科学研究表明猫和狗在一定的情况下是能够和平相处的。如果先收养猫并且猫不到6个，狗不到一年，他们就能顺利地和平相处。通过观察他们不能和平相处的原因是他们之间误解了彼此的身势语而造成的。但有趣的是猫和狗能够相互学习彼此的身势语，这样他们就能和平相处。

　　31.D考查推测词义。如果先收养猫并且猫不到6个，狗不到一年，他们就能顺利的和平相处。2/3被采访的家庭也表明这样的结果。

　　32. C考查细节理解。根据第二段while aggression and fighting were observed in 10% of the homes. One reason for this is probably that some of their body signals were just opposite.可知选C。

　　33.C考查细节理解。根据文章第三段In homes with cats and dogs living peacefully, researchers observed a surprising behaviour. They are learning how to talk each other’s language.可知C正确。

　　34. B考查细节理解。根据文章第四段中的They can learn to read each other’s body signals, suggesting that the two may have more in common than was preciously suspected.可知B正确。

　　35. A考查推理判断。根据文章的最后一段可知，在动物王国，人们公认的猫和狗都能和平相处，何况人呢?

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