Ⅲ.Reading Comprehension（30points，2points for each）从下列每篇短文的问题后所给的四个选择项中选出一个最佳答案，填在该题后的括号内。

Passage One

Questions21 to 25 are based on the following passage.

    People in cities all over the world shop in supermarkets. Who decides what you buy in the supermarkets? Do you decide? Does the supermarket decide?

    When you enter the supermarket，you see shelves full of food. You walk in the aisles（过道）between the shelves. You push a shopping cart and put your food in it.

    You probably hear slow music as you walk along the aisles; if you hear fast music，you walk quickly. The super-market plays slow music. You walk slowly and have more time to buy things.

    Maybe you go 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 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 dairy（乳制品）department sells milk and milk products such as butter and cheese. Many customers like milk that has only a little butterfat in it. One store has three different containers of low fat milk. One says“1percent（1%）”fat on the container. The second says“99percent（99%）far 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. The amount of milk in each container is also the same. However in this store the three containers of milk don t cost the same. Maybe the customer will buy the milk that costs the most.

21.This passage mainly discusses _____. 【  】
A. why people in cities shop in supermarkets
B. what influences people s shopping in supermarkets
C. what people usually buy in supermarkets
D. how music is related to people s shopping in supermarkets

22.The supermarket plays slow music so that _____. 【  】
A. it may attract more customers
B. it may seem more like a home
C. customers will feel more comfortable
D. customers will possibly buy more

23.The manager knows _____. 【  】
A. which customers like low fat milk
B. which customers like slow music
C. where customers enter the meat department
D. where customers enter the dairy department

24.The cheaper meat is put at the end of the meat department because _____. 【  】
A. the supermarket wants to sell more of the expensive meat
B. customers can be easily reminded before they leave
C. the supermarket intends to sell it at its original price 
D. customers can be easily enabled to make a comparison

25.The author implies that customers tend to believe that _____ . 【  】
A. the more expensive the milk，the better its quality
B. the bigger the container，the better the milk in it
C. the less fat the milk contains，the cheaper it costs
D. the more words there are on the container，the less fat the milk in it contains

Passage Two

Questions26 to30 are based on the following passage.

    All of us rely on what we see. W e say to ourselves，“I know，I was there; I saw it happen”and that seems to settle the matter. Or does it? Can we really trust the evidence of our eyes?

    Take competitive sports. Fans who see the same game will not agree with each other and will the disagree with the referee（裁判）.“He was out of bounds when he caught the pass，”says one fan. Says another，“You are crazy. I saw it with my own eyes. He was five feet in bounds. You must be blind.”The referee rules that the receiver did step out of bounds. But thousands of fans are still not convinced—because they were there!

    It s the same story in the courtroom. Trial procedure depends on witnesses giving sworn testimony（证词）.But just how reliable is the testimony of a person who reports what he has seen? In a recent study，ten thousand witnesses were asked to describe the man they saw commit a crime. The study reveals that，on the average，the witnesses overestimated the man s height by five inches，his age by eight years，and gave the wrong hair color in83percent of the cases. These witnesses didn’t play tricks on them!