B. not to go to well-known places

　　C. not to visit dangerous places

　　D. to buy anything you want to buy

　　70. During your trip, _____.

　　A. you need more medicine than clothes

　　B. you should look for work all the way

　　C. you can gain valuable life experiences

　　D. you should remember to do your homework

　　第二节：（共5小题；每小题2分，满分10分）

　　根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

　　NOISE

　　The people who lived in Rome 2,000 years ago were already talking about the noise in their city．They couldn’t sleep，they said，with all the people and carriages in the streets．For them noise was only a trouble，but for us it has become a real danger．We know that sounds of an ordinary city are loud enough to cause serious harm to the people's hearing--in the United States, one person out of twenty has suffered some hearing loss．

　　71

　　It has increased greatly in the 20th century with the development of machines. We live surrounded by loud planes，trucks，buses，radios，machines–that make such loud noises day and night up to 90 or 100 decibels（分贝）. A usual talk reaches 55 decibels. A jet plane goes to 100 decibels and more．“Pop”music reaches around 118 decibels. At 120 decibels the ear stops hearing sound, and the ear suffers a lot．

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