单选题 No one knows how man learned to make words. Perhaps he began by making sounds like those made by animals. Perhaps he grunted like a pig when he lifted something heavy. Perhaps he made sounds like those he heard all round him—water splashing, bees humming, a stone falling to the ground. Somehow he learned to make words. As the 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. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life.
The words you know are called your vocabulary. You should try to make your vocabulary bigger. Read as many books as you can. There are plenty of books written in easy English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most useful book.

单选题 From this passage, we know that ______.

【正确答案】 C

【答案解析】[解析] 第一段第二句：“Perhaps he began by making sounds like those made by animals. ”
事实细节题。根据定位句可知，人类也许刚开始是像动物一样发出声音。故选C。

单选题 The number of different languages spoken is about ______.

【正确答案】 B

【答案解析】[解析] 第二段第二句：“Today there are about fifteen hundred different languages in the world. ”
事实细节题。根据定位句可知，当今全球大约有1500种语言。故选B。

单选题 People from different countries ______.

【正确答案】 B

【答案解析】[解析] 第二段第一句：“People living in different countries made different kinds of words. ”
事实细节题。根据定位句可知，生活在不同国家的人们创造了不同的文字。故选B。

单选题 Man ______ to make sounds.

【正确答案】 B

【答案解析】[解析] 第一段第二、三、四句：“Perhaps he began by making sounds like those made by animals. Perhaps he grunted like a pig when he lifted something heavy. Perhaps he made sounds like those he heard all round him—water splashing, bees humming, a stone failing to the ground. ”
推理判断题。根据定位句可知，人类模仿他周围所听到的一切声音，也就是说他模仿自然界的许多事物来发声。故选B。

单选题 You can enlarge your vocabulary by ______.

【正确答案】 A

【答案解析】[解析] 最后一段第二、三句：“You should try to make your vocabulary bigger. Read as many books as you can. ”
事实细节题。根据定位句可知，应该尽量多读书，这样可以增加词汇量。故选A。