20、Many animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food．

You may like it because it smells good or because it tastes good．You may dislike some types of food because they do not look, smell or taste very nice. Different animals use different senses to find and choose their food．A few animals depend on only one of their senses, while most animals use more than one sense.

Although there are many different types of food, some animals spend their lives eating only one type. The giant panda eats only one particular type of bamboo. Other animals eat only one type of food even when given the choice. A kind of white butterfly（蝴蝶）will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet（多样化饮食）. The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.

Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat （羊肉，牛肉） and animal products, such as butter, can also be bad for the health. Choosing the right food, therefore, has become an area of study in modern life.

1. We can infer from the text that humans and animals _________.

     A．depend on one sense in choosing food  B．are not satisfied with their food  

     C．choose food in similar ways          D．eat entirely different food

2. Which of the following eats only one type of food?  

     A．The white butterfly. B．The small bird． C．The bear.      D．The fox.

3. Certain animals change their choice of food when ___________. 

     A．the season changes                  B．the food color changes  

     C．they move to different places          D．they are attracted by different smells

4. We can learn from the last paragraph that __________.  

     A．food is chosen for a good reason       B．French and British food is good  

     C．some people have few choices of food      D．some people care little about healthy diet

19、Shopping habits in the United States have changed greatly in the last quarter of the twentieth century. Early in the 1900s, most American towns and cities had a Main Street. Main Street was always in the heart of a town. This street was lined on both sides with many businesses. Here, shoppers walked into stores to look at all kinds of merchandise（商品）：clothing, furniture, hardware（五金）, groceries（杂货）. In addition, some shops offered services. These shops included drugstores, restaurants, shoe-repair stores, and barber or hairdressing shops. But in the 1950s, a change began to take place. Too many cars and trucks had crowded into Main Street. There were few parking places. Because the streets were crowded, merchants（商人） began to look with interest at the open spaces outside the city limits. Open space is what their car-driving customers needed．And open space is what they got when the first shopping center was built. Shopping centers, or malls, started as collection of small new stores built away from crowded city centers. Attracted by hundreds of free parking spaces, customers were drawn away from downtown areas to the outlying malls.

By the late 1970s, many shopping malls had almost developed into small cities themselves. In addition to providing the convenience of one-stop shopping, malls were changed into landscaped parks, with beautiful flowers, fountains, and outdoor entertainment. For example, one of the shopping malls is The Galleria in Houston, Texas. Inside the Galleria, more than ten of shops face balconies and there is an indoor ice skating rink（溜冰场）. Some of Houston’s best restaurants are also here. Atop（在……顶上） the whole mammoth（巨大的） structure is a new hotel. The Galleria, and other imaginative shopping centers throughout the United States, have led a magazine to title its recent leading article “The Malling of America”.

1. Which of the following is not correct?

A．During the 1950s, many parking places were available（可用的，有效的） to shoppers who drove to any Main Street.

B．Before the 1950s, a Main Street was a shopping center in most American towns.

C．Main Street was usually in the heart of a town.

D．At the beginning of the 20th century, all kinds of stores were located along Main Street.

2. The Galleria in Houston, Texas is ____________.

  A．a huge and modern restaurant.         B．a beautiful guest house.

  C．a soaring new hotel.                D．a wonderful shopping mall.

3. The best title for this passage would be ____________.

A．The changes of American Shopping Centers.

B．The Malling of America.

C．The Convenience of One-stop Shopping.

D．The Past and Present of the American People

17、There is        red apple and        orange in the picture.

A．a, an           B．the, an          C．an, a         D．a, the

16、Mr. Shute is a friend of       .

A．John’s uncle          B．John uncle’s         C．John’s uncle’s           D．John uncle

15、—Would you like to have tea or coffee?

 —        . I really don’t mind．

A．Both            B．None           C．Neither           D．Either 

14、—Is that student Li Ming in the classroom?   

—No, he _____ there. I saw him in the reading room just now.

A．is             B．mustn’t be            C．needn’t be           D．can’t be      

13、Mr. Zhou asked him        a report on how to protect wild animals.

A．write          B．to write           C．writes           D．writing 

12、What fine weather! Let’s go boating,       ?

A．will you          B．shall we         C．shan’t we         D．won’t you

11、       of the students of our school        girls.

A．Two third, are                   B．Two thirds, is       

C．Two thirds, are                  D．Second three, are