84. The writer of the article thinks that　　　　　　　　　 .

A. Professor Eric Klinger has a better idea than L. Giambra

B. daydreaming with an unconscious mind will do good to health

C. daydreaming is more helpful than sleep dreams

D. many artists and scientists are famous because they have daydreams

83. Professor Eric Klinger believes that　　　　　　　　　 .

A. we may study our experiences just through our daydreams

B. daydreaming is one of the important ways that we recognize our lives

C. we should be able to tell our futures by having daydreams

D. our fears and longings in life are shown in our daydreams

82. In what way are daydreams different from sleep dreams?

A. Daydreams are easier for us to understand.

B. Daydreams are not so easy for us to control and direct.

C. Daydreams help us to handle more difficult situations.

D. Daydreams help to develop an unconscious mind.

81. Daydreaming used to be considered　　　　　　　　 .

A. very simple and direct

B. unimportant or even harmful

C. a necessary part of thinking

D. the result of an unconscious mind

80. According to the passage, the computer technology can　　　　　　　　 .

A. get rid of the need for frost protection

B. help the farmer get a better harvest

C. tell the farmer why outdoor temperature changes

D. prevent the temperature from dropping to the freezing point

(D)

Have you ever been in a meeting while someone was making a speech and realized suddenly that your mind was a million miles away?You probably felt sorry and made up your mind to pay attention and never have daydreaming again. Most of us, from earliest school days, have been told that daydreaming is a waste of time.

"On the contrary, "says L. Giambra, an expert in psychology(心理学), "daydreaming is quite necessary. Without it, the mind couldn't get done all the thinking it has to do during a normal day... You can't possibly do all your thinking with a conscious(有意识的)mind. Instead, your unconscious mind is working out problems all the time. Daydreaming then may be one way that the unconscious and conscious states of mind have silent dialogues. "

Early experts in psychology paid no attention to the imporance of daydreams or even considered them harmful. At one time daydreaming was thought to be a cause of some mental illnesses. They did not have a better understanding of daydreams until the late 1980s. Eric Klinger, a professor of psychology, is the writer of the book Daydreaming. Klinger says, "We know now that daydreaming is one of the main ways that we organize our lives, learn from our experiences, and plan for our futures...Day dreams really are a window on the things we fear and the things we long for in life. "

Daydreams are usually very simple and direct, quite unlike sleep dreams, which may be hard to understand. It's easier to gain a deep understanding of your life by paying close attention to your daydreams than by trying to examine your　 sleep dreams carefully. Daydreams help you recognize the difficult situations in your life and find out a possible way of handling(处理)them.

Daydreams cannot be predicted(预料);they move off in unexpected directions which may be creative and full of useful ideas. For many famous artists and scientists, daydreams were and are a main source of creative energy.

So the next time you catch yourself daydreaming, don't stop. Just pay attention to your dream. It may be more important than you think.

79. Which of the following is NOT NECESSARY for Ed Rawlings to do?

A. He should water the orange trees as soon as the temperature drops to the freezing point.

B. He should decide the quantity of water for the orange trees.

C. He has to water the orange trees more often in January and February.

D. He has to judge how often he should water the orange trees.

78. In the writer's eyes, computers　　　　　　　　 .

A. are too expensive for small farmers

B. can be a valuable tool for the farmer　

C. can be used to help oranges grow bigger

D. cannot take the place of the farmer's experience and judgement

77. Ed tried to protect his crop by　　　　　　　　 .

A. using a wind machine to　 drive away the cold air

B. equipping his orange trees with a computer

C. watering it at the proper time

D. picking his fruit at the first sign of frost

76. The passage is mainly about　　　　　　　　 .

A. a farmer's expert care for his orange trees

B. the different uses of computers

C. growing oranges in Florida's changeable weather

D. different ways of frost protection

75. The passage is mainly about　　　　　　　 　　.

A. a group of cold-water swimming lovers

B. the Polar Bears' life in New York

C. doctors' ideas about cold-water swimming

D. the requirements of the Polar Bear Club

C

Farmer Ed Rawlings smiles as he looks at his orange trees. The young oranges are growing well in Florida's weather. Warm sunshine and gentle rains, along with Ed Rawlings'expert care, will produce a good crop of oranges this year.

But Ed has to fight against Florida's changeable winter weather. In January and February, temperatures can destroy Ed's entire orange, crop. Having farmed in Florida for the past 35 years, Ed Rawlings is prepared for the frosts(霜). When temperatures drop below freezing， Ed tries to save his crop by watering his orange trees. The water freezes and forms a thin layer (层)of ice on the trees. Strange as it may sound, this thin layer of ice actually keeps the fruit warm.

What happens is simple. When the trees are watered, the water loses heat and becomes ice. The warmth of the heat it loses is sucked in by the fruit and keeps its temperature at a safe level. Ed Rawlings has effectively used this method(方法)to save many orange crops.

But Ed still faces some difficulties. The trees should be watered at the exact moment the temperature drops to the freezing point. Also, just the right quantity of water must be used. Too much water can form a thick layer of ice that will break the trees'branches. Another difficulty is that wind blows away the heat. So Ed has to worry about not only when but also how often his trees should be watered, and how much water should be used.

Computer technology may help Ed Rawlings with some of these worries. With equipment, air and soil temperatures and wind speed can be measured. The information is fed into a computer which can tell when temperatures drop to freezing. The computer can correctly decide the quantity of water to be used and how frequently the trees should be　　 watered. Ed Rawlings will find looking after his orange trees a lot easier with the help of a computer, and we'll all have the benefits(or advantages)of computer-age oranges.