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you are a book-lover or merely there to buy a book a present. You may even have entered the shop just to find shelters away a sudden shower. --72. Whatever the reasons, you can soon become totally unaware of your surroundings. The desire to pick up a book with an attractive dust jacket is irresistible, even this method of selection ought --73. not to be followed, as you might end up with a rather bored book. You soon become engrossed in --74. some book or other, and usually it is only much later that you realise you have spent far much --75. time there and must dash off to keep some forgotten appointment -- without buying a book, of course. This opportunity to escape the realities of everyday life is, I think, the main attraction of a bookshop. There are not many places where it is impossible to do this. A music shop is very much --76. like a bookshop. You can wander round such places to your hearts content. If it is a good shop, no assistant will approach to you with the inevitable --77. greeting: Can I help you, Sir? You neednt buy anything if you dont want. In a bookshop an assistant should remain the background until you --78. have finished browsing. Then, only then, are his services necessary. Of course, you may want to find out where a particular section is, since when he --79. has led you there, the assistant should retire discreetly and look as he is not interested in --80. selling a single book. 答案： 71. if -- whether 72. from 73. although 74. bored -- boring 75. too 76. impossible -- possible 77. / 78. in 79. since -- but 80. if | 
