4.阅读理解.

4.阅读理解.
Time spent in a bookshop can be most pleasant,whether you are a book-lover or merely there to buy a book as a present.You may even have entered the shop just to find shelter from a sudden shower.Whatever the reason,you can soon become totally unaware of your surroundings.You soon focus on some book or other,and usually it is only much later that you realize you have spent too much time there and must hurry off to keep some forgotten appointment.
This opportunity 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 range round such places to your heart's content.If it is a good shop,no assistant will approach 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 obtain it from the library and the only copy he could find was in a bookshop.Every afternoon,therefore,he would go 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 its usual place.He was about to leave,when he noticed the owner of the shop making a gesture to him with his hand.Expecting to be scolded,he went towards him.To his surprise,the owner pointed to the book which was put away in a corner."I put it there in case anyone had a desire to buy it!" he said,and left the delighted student to continue his reading.
16.Time spent in a bookshop can be most pleasant _______________.
A.only when you can find the book you want to buy
B.only when you are a book-lover
C.even when you enter it to avoid a sudden shower
D.even when you know you are late for an appointment
17.A bookshop is of much attraction because ______________ .
A.it offers you an opportunity to forget about everyday life
B.it offers you an opportunity to listen to as much music as possible
C.it allows you to learn about new ideas and ways of doing things
D.it allows you to have a good excuse for being late for an appointment
18.In a good bookshop __________.
A.an assistant should always follow you
B.an assistant should frequently approach you and offer help
C.you needn't buy anything you don't want
D.you can communicate freely with an assistant
19.The medical student went to a bookshop every day _____________.
A.to look for useful books
B.to read a textbook
C.to talk with the shop owner
D.to use the computer at the shop
20.The owner of the bookshop put away the book ______________.
A.in case other people wanted to buy it
B.in case the medical student wanted to buy it
C.because he wanted to sell it at a high price
D.because he wanted to keep it for himself