10．The amount of oxygen an animal uses depends on _________.

　　　　 A．its body weight　　　 B．the food it eats

　　　　 C．its general size and shape　　　　　　　　　　　　　　 D．the length of time it lives

9．The speed at which an animal lives is determined by measuring __________.

　　　　 A．the amount of food it eats 　　　　　　　　　　　　 B．the rate at which it uses oxygen

　　　　 C．the amount of oxygen it uses　　　　　　　　　　　 D．its body temperature

8．Warm-blooded animals maintain a steady temperature by ________.

A．regulating the amount of heat produced　　

B．storing heat in their body cells

C．controlling the amount of heat given off　　

D．constantly replacing lost surface heat

7．Among the problems big cities are facing, the basic one is that ________.

　　　　 A．there are too many holes　　　　　 　　B．there is a labor shortage

　　　　 C．moving rubbish to faraway dumps is too costly

　　　　 D．finding a new way for recycling is difficult

C

Every animal is a living radiator(散热器)－heat formed in its cells is given off through its skin. Warm-blooded animals maintain a steady temperature by constantly replacing lost surface heat; smaller animals, which have more skin for every ounce of body weight, must produce heat faster than bigger ones. Because smaller animals burn fuel faster, scientists say that they live faster.

The speed at which an animal lives is determined by measuring the rate at which it uses oxygen. A chicken, for example, uses one-half cubic centimeter of oxygen every hour for each gram it weighs. The tiny shrew uses four cubic centimeters of oxygen every hour for each gram it weighs. Because it uses oxygen eight times as fast, it is said that the mouselike shrew is living eight times as fast as the chicken. The smallest of the warm-blooded creatures, the hummingbird, lives a hundred times as fast as an elephant.

There is a limit to how small a warm-blooded animal can be. A mammal or bird that weighted only two and a half grams would starve to death. It would burn up its food too rapidly and would not be able to eat fast enough to supply more fuel.

6．Crushers and rollers are used to __________-

　　　　 A．remove the sharp metal objects　　　　　　　　 B．reduce items to small pieces

　　　　 C．separate the light elements　　　　　　　　　　　　 D．tear open the plastic bags

5．Which of the following cities is NOT mentioned in the passage as a center of Jazz?

　　　　 A．New York　　　　　　　　 B．Washton, D. C　　　　　　 C．Chicago　　　　　　　 D．New Orleans

B

A new project is being set up to discover the best ways of sorting and separating rubbish. When this project is completed, rubbish will be processed(处理) like this: First, it will pass through sharp metal spikes(尖状物) which will tear open the plastic bags in which rubbish is usually packed; then it will pass through a powerful fan to separate the lightest elements from the heavy solids; after that crushers and rollers will break up everything that can be broken. Finally, the rubbish will pass under magnets(磁铁) which will remove the bits of iron and steel; the rubber and plastic will be then sorted out in the final stage.

The first full- scale giant recycling plants are, perhaps, years away. But in some big industrial areas, where rubbish has been dumped for so long that there are no holes to fill up with rubbish, these new automatic recycling plants may be built sooner. Indeed, with the growing cost of transporting rubbish to more distant dumps, some big cities will be forced to build their own recycling plants before long.

4．The passage supports which of the following conclusions?

　　　　 A．By the 1930’s jazz was appreciated by a wide audience.

　　　　 B．Classical music had a great hit on jazz.

　　　　 C．Jazz was born in New Orleans in the early 19th century.

　　　　 D．Jazz bands were better known in Europe than in the United States.

3．According to the passage, which of the following Black bands was the first to make a significant set of jazz recordings?

　　　　 A．The hot Sevsn band.　　　　　　　　　　　　　　　　　　　 B．Fletcher Henderson’s band.

　　　　 C．The red hot Peppers band.　　　　　　　　　　　　　 D．King Oliver’s Creole Jazz Band.

2．It can be inferred from the passage that Louis Armstrong went to Chicago for which of the following reasons?　

A．to form his own band.

B．To learn to play Chicago-style jazz.

　　　 C．To play in Joseph Oliver’s band.　　　

D．To make recordings with the Hot Five.

1．What is the main purpose of the passage?

　　　　 A．To compare jazz to other types of music.

B．To criticize jazz musicians and their music.

　　　　 C．To describe the careers of important jazz musicians in the 1930’s.

　　　　 D．To trace the development of jazz in the United States.