We can understand why the whistle language continues. It is very useful on the island, and quite easy to learn. When somebody is hurt or ill, the whistle language takes the place of telephone. If the sick person is quite far away from the town, people pass the message from one to another. A boy guarding cattle on a hillside whistles to a man fishing from his boat. The last one is able to describe the trouble fully and exactly to the doctor in town. People help one another in the same way when a car breaks down or a cow is lost.

　　The whistle language is hundreds of years old, and probably it will continue to live on for hundreds of years more. Radio and TV often kill the special ways of speaking in different parts of a country. But on La Gomera you are nobody if you cannot whistle. Perhaps soon after TV arrives on the island, people there will be whistling the news and other facts and opinions.

　　本文是一篇说明文，讲述的是世界上的另外一种语言——“whistle language”的相关历史。

　　4．If a person on La Gomera is ill, ________.

　　A．the whistle language will help pass the message to the doctor

　　B．people will take him to town by carriage

　　C．his family will take him to the hospital

　　D．others will phone the doctor in town

　　答案：A　细节理解题。根据第三段“If the sick person is quite far away from the town, people pass the message from one to another.”可知。

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