Questions 57 to 61 are based on the following passage. People's tastes in recreation differ widely. At a recent festivalof pop-music in the Isle of Wight, crowds of agers flocked to listen totheir favorite singers and musicians. They went with single railway tickets andslept in the open, a very risky thing to do in the climate of Britain, even inAugust. They were packed together like sardines for four days. There wereinnumerable thieves, a gang of roughs tried several times to break things up,and police were everywhere. At the end of the festival many young fans foundthemselves broke, with no money left, and they had difficulty in getting backhome. Most people would consider these conditions a nightmare of discomfort;the fans appeared to enjoy it all enormously. Even in the overcrowded United Kingdom there are large tracts ofopen un-spoilt country, where people with more traditional tastes can go forquiet, and for the sense of they derive from contact with nature. Inthe national parks especially, modem development of housing and industry isstrictly controlled. Visitors may walk for miles through landscape of thegreatest beauty and wildness, and often of considerable historic or scientific interest.Along the coasts of some of the maritime counties, public pathways have beencreated; these paths stretch for many miles along cliffs that look out on theAtlantic Ocean or the English Channel. Another path,lying inland, goes alongthe range of mountains in the north of England. It is called the Pennine Way.Here, the long-distance walker and the nature-lover can find much to enjoy,without feeling disturbed by large numbers of their fellows. Yet few people make full use of the national parks established foreveryone's benefit. The commonest thing nowadays is for family groups to motorout to a beautiful spot and park their cars in a lay-by ( 英国的路旁停车带). A picnic basket isproduced, along with a folding table and chairs, a kettle and a portable stove.They then settle down to a picnic in the lay-by beside the car. Apparentlytheir idea of enjoyment is to get into the fresh air and amongst the countrysights and sounds without having to walk a yard. They seem almost to like tohear and to smell the traffic. 57.In Britain it is very risky to __________