1.There are two bookshelves A and B .There are 450 books on

She has a lot of books , but she has not many bookshelves .

A．a little

B．much

C． a few

D．many

My bookshelves are full of dust — and with good reason. When it comes to cleaning that part of my home, I suffer from the most serious case of avoidance (回避反应症).
The thing is this: when I do set out to clean and re-organize my books, which seldom happens, I place myself into a really bad situation. No sooner do I take a title from the shelf, blow off the dust, and wipe down the cover than I find myself sitting on the floor with legs crossed and my back against the wall. Pretty soon books get piled up on my legs as I am reunited with old friends.
It is as if these books have voices, and each wants to say its piece. “Remember me? I was given to you when you went into the Navy, so that you would never lack for companionship,” one whispers. Another says, “I was your first book of poems, given to you before you learned to love poetry.” And a third, “I was the book that made history so attractive to you.”
Perhaps the greatest pleasure of re-organizing my books are the surprises — or better said, reunions — that occur. During my latest book-cleaning adventure, I found one that had fallen behind the shelf: “Tales of Edgar Allan Poe.” Not an unusual title, but the words written on the first page made it very special: “With Love from Mom and Dad, Christmas 1965.” What’s this? A book on the physics of lasers（激光）. It is filled with mathematical statements, and I had bought it at a library sale when I was 12, not long after the laser had been invented. I couldn’t understand a bit of it, but I did learn what “laser” meant.
What I end up with when I empty my bookshelves is a cross-section (横剖面) of my personal history. It’s like a road cut where one sees all the layers of rock going back through time to the beginning of the simplest life forms. The books I’ve read — and kept — are not just old friends. They are my résumé.
50. What could be said about the author?
A. He is too busy to tidy up his bookshelves.
B. He considers his books treasured possessions.
C. He has made a lot of notes in his books.
D. He is a lover of science books.
51. By saying that his books have voices, the author means ________ .
A. they bring back happy memories
B. they are recorded in human voice
C. they say a lot about human history
D. they offer good topics for discussion
52. What does the author enjoy most from re-organizing his books?
A. Finding some missing books.
B. Putting books in good order.
C. Learning something new from the books.
D. Rediscovering interesting stories behind some books.
53. The underlined word “résumé” in the last paragraph probably means ______.
A. personal history B. precious notes
C. good companion D. simple life forms

When you enter a supermarket, you see shelves full of food. You walk between the shelves. You carry a shopping basket w ith your food in it.
You probably hear soft, slow music as you walk between the shelves. If you hear fast music, you walk quickly. The supermarket plays slow music. You walk slowly and have more time to buy things.
Maybe you go to the meat department first. There is some meat on sale, and you want to find it. The manager of the supermarket knows where customers enter the meat department. The cheaper meat is at the other end of the meat department, away from where the customers enter. You have to walk by all the expensive meat before you find the cheaper meat. Maybe you will buy some of the expensive meat instead of the meat on sale.
The department selling milk and milk products such as butter and milk powder is called the dairy department. Many customers like milk that has only a little butter fat in it. One store has three different jars of low fat milk. One says “1 percent fat” on the jar. The second says “99 percent fat free”, the third says “Low fat” in big letters and “1%”in small letters. As you can see, all the milk has the same amount of fat. The milk is all the same. However, in this store the three jars of milk cost three different amounts of money. Maybe the customers will buy the milk that costs the most.
Most of the food in supermarkets is very pleasing. It all says “Buy me!” to the customers. The expensive meat says “Buy me” as you walk by. The expensive milk jar says “Buy me! I have less fat.”
77. The manager of the supermarket knows______.
A. which customers like low fat milk 　　　　　　　B. which customers like slow music
C. where customers enter the meat department 　　　D. where customers come from
78. When you walk by the expensive meat, maybe you will______.
A. buy some 　　　B. try to find fresh fruits 　　　C. look for low fat milk 　　D. just walk on
79. There are three different jars of low fat milk and_____.
A. one has more fat than the other two 　　　 B. they are almost the same amount of money
C. one has less fat than the others 　　　　 D. they all have the same amount of fat
80. Supermarket managers make the food pleasing so that_____.
A. there will be more buyers 　　　B. buyers will be proud
C. it is good and expensive 　　　D. they can raise the prices