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.

　　1. The passage is mainly about _____.

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

　　B. the different uses of computer

　　C. growing oranges in Florida's changeable weather

　　D. different ways of frost protection

　　2. 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

　　3. 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

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

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