题目内容：

Time spent in a bookshop can be most enjoyable, whether you are a book-lover or only there to buy a book as a present. You may even have entered the shop just to find a shelter from a sudden shower. Whatever the reason, you can soon totally unaware of your surroundings. You soon become interested in some books or others, and usually it is only much later that you realize you have spent too much time there and have to rush off to keep some forgotten appointment.

This chance to escape the realities of everyday life is the main attraction of a bookshop. A music shop is very much like a bookshop. You can walk around such a place to your heart's content. If it is a good shop, no assistant will come up to you with the greeting "Can I help you?" You needn't buy anything you don't want. In a bookshop an assistant should remain in the background until you have finished reading. Then, and only then, are his services necessary.

Once a medical student had to read a textbook which was far too expensive for him to buy. He couldn't borrow it from the library and the only copy he could find was in a certain bookshop. Every afternoon, therefore, he would go along to the shop and read a little of the book at a time. One day, however, he was disappointed to find the book missing from his usual place. He was about to leave, when he noticed the owner of the shop beckoning to him. Expecting to be told off, he went towards him. To his surprise, the owner pointed to the book which was tucked away in a corner. "I put it there in case anyone tries to buy it !"He said, and left the delighted student continuing his reading.

1.According to the passage the main attraction of a bookshop is that ________.

A. people can learn something from books 　 　

B. it can be a shelter from a sudden rain

C. it is the surrounding of new knowledge 　　

D. it offers a chance to get free from realities

2.The writer thinks that the assistant in a good bookshop should ________.

A. always greet customers pleasantly and warmly 　　

B. help the readers to find what they want to read

C. not say a word to the customers while they read 　　

D. not stand behind the bookshelf all the time

3.The underlined word "beckoning" in the last paragraph means ________.

A. waving somebody to come up 　    B. laughing at a person openly

C. shouting at somebody angrily     D. shaking one's head to show disagreement

4.The purpose of the writer in writing the third paragraph is to ________.

A. tell us a story that happened in a bookshop 　　

B. support his idea of what a good bookshop is like

C. teach us how to read in a shop without buying books

D. advise us to help other people whenever we can