7．A rabbit is running into its hole．You may ask，"What happened？"
Well，when a rabbit sees something dangerous，it runs away．Its tail moves up and down as it runs．When other rabbits see this tail moving up and down，they run too．They know that there is danger．The rabbit has told them something without making a sound．It has given them a signal（信号）．
Many other animals use this kind of language．When a bee found some food，it goes back to his home．It can not tell the other bees where the food is by speaking to them，but it does a little dance in the air．This tells the bees where the food is．
Some animals say things by making sounds．A dog barks，for example，when a stranger comes near．A cat purrs （发出呼噜呼噜的声音）when pleased．Some birds make several different sounds，each with its own meaning．
But human beings have something that no animals have---a large number of words about things，actions，feelings or ideas．We are able to give each other information，to tell or inform other people what is in our mind or how we feel．By writing words down we can remind ourselves of the things what have happened，or send messages to people far away．No animals can do this．No animals has the wonderful power of language．
No one knows how man learned to make words．Somehow he learned to make them．As centuries went by，he made more and more new words．This is what we mean by language．
People living in different countries made different kinds of words．Today there are about fifteen hundred different languages in the world．A very large English dictionary，for example，contains four or five hundred thousand words．But we do not know all these．The words we know are called vocabulary．We should try to make our vocabulary larger．Read as many books as possible．When we meet a new word，look it up in the dictionary．A dictionary is the most useful book．
51．When a rabbit gives the other rabbits a signal of danger，itC．
A．runs into its hole
B．stops to move its tail
C．runs with its tail moving up and down
D．stops moving its tail up and down as it runs
52．It has been proved that no animal is able toB．
A．give the others information
B．tell others how it feels
C．express it actions and feelings with words
D．make different sounds，each with its own meaning
53．A dog can tell somethingB．
A．by giving signals
B．by making different sounds
C．by purring
D．by barking
54．Generally speaking，what we mean by"vocabulary"isB．
A．all the words that we know
B．more and more words we use
C．all the words we need
D．the dictionary which contains thousands of words
55．What must we do in order to make our vocabulary large？D
A．Make more and more new words．
B．Learn more languages．
C．Look up any new words in a dictionary．
D．Try to read as many books as possible．
分析 文章大意：这篇文章主要讲了，动物通过动作或者叫声来表达自己的喜怒哀乐，而人类是通过话语，情感或思想来表达自己的感受，没有动物具有语言的神奇力量．
解答 51-55：CBBBD
51题答案：C 细节理解题．根据文中Its tail moves up and down as itruns．When other rabbits see this tail moving up and down，they run too．可知当兔子给其他兔子信号的时候它跑的时候尾巴会上上下下的动．可知选C．
52题答案：B 细节理解题．根据文中No animals can do this．No animals has the wonderful power of language．可知没有动物能够告诉别人自己的感受．故选A．
53题答案：B 细节理解题．根据文中A dog barks，for example，when a stranger comes near可知狗可以发出不同的信号来告诉事情，可知应选B．
54题答案：B 词义猜测题．一般而言vocabulary的意思是我们用的词汇．故选B．
55题答案：D 细节理解题．根据文章We should try to make our vocabulary larger．Read as many books as Possible可知要扩大词汇就要我们尽可能多读书．，故选D．
点评 本文是一篇人物故事类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对 性找出相关语句进行仔细分析，结合选项选出正确答案．推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案．
