D
　　Pocket Tape-Recorders "Family and Home Magazine" test what’s on the market now.
　　1. Pearlcorder S702 $ 64
　　This simple model at the bottom of the Olympus range scored the most points for its excellent quality of recording. Background noise hardly affects the sound and recording from a pocket is perfectly possible, but it doesn’t turn off automatically.
　　Tape length: 30 minutes per side. Weight: 240g.
　　2. Sony M9 $ 49. 95
　　Small and very good looking. Sony’s latest offering scored most for appearance. Sounds clear, but there is slight machine noise. The big control buttons are a great improvement on some of the complicated little controls on other tape-recorders. Doesn’t switch off automatically but a red light shows if the machine is still running.
　　Tape length: 60 minutes per side. Weight: 195g.
　　3. Sony M400 $115
　　Lots of little control buttons that make a noise and are difficult to use. Recording was good but machine noise lost points. Tape counter and automatic switch-off when tape has finished recording or rewinding are useful.
　　Tape length: 60 minutes per side. Weight: 230g.
　　4. Imperial OEM. MC 7 $ 29. 95
　　Cheap and simple compared with the rest, but recording was good as long as there was no background noise. Use only its own make of cassette. No light to show it is on, no fast forward button and the record button makes a loud noise.
　　Tape length: 30 minutes per side. Weight: 285g.
　　5. Philips 585 $ 80
　　Handsome and simple to use, but recording is very poor at more than the recommended distance of 5 cm-designed for dictation. No recording light.
　　Tape length: 15 minutes per side. Weight: 220g.
　　68. The machine that produces the best recording with the least unwanted noise is the ______.
　　A. Pearlcorder S702 B. Sony M9 C. Sony M400 D. Imperial OEM MC7
　　69. If you want a machine which turns off automatically and weighs very little you should choose the ______.
　　A. Pearlcorder S702 B. Sony M9 C. Sony M400 D. Philips 585
　　70. Which machine is unsuitable for general use?
　　A. Pearlcorder S702. B. Imperial OEM MC7. C. Sony M400. D. Philips 585.
　　71. What disadvantage does only the Imperial OEM MC7 have?
　　A. No light shows when it is on. B. It’s is easy to operate and inexpensive as well.
　　C. It requires a special cassette. D. The record button makes a noise.
　　E
　　When nature is left alone, a balance is reached among the animals and plants living in one area. But when man starts his work in nature, the balance is likely to be destroyed. He grows a crop and takes it away to eat; then there are no dead leaves to fall on the ground, holding water while it sinks into the surface, or decaying(腐烂)and adding humus (腐殖质) to the soil. Unless a farmer acts with knowledge and skill, he is therefore most likely to make the land poorer. To take the place of the useful matter in the crops that he removes, he uses some kind of fertilizer(肥料). Chemical fertilizers are of great help, but the waste products of animals and decaying remains of plants should also be put on the land. In some places, it is a habit to burn waste material lying about, but such burning destroys the useful matter in the dead plants. Although the ashes that are left are valuable when put on the land, a better practice is to bury the waste so that it decays and increases the humus in the soil.
　　In the past, when the world population was much lower than it is now, a man had little difficulty in ordinary times in growing the food that was needed. When a field had been used some years and had become tired, the farmer could move to another place. The tired land then slowly recovered. Gradually grasses and other plants would appear on it and its productive power would slowly return to normal through their decay. But nature, left alone, would take a long time to bring back the land to its former state; the length of time required would depend on local conditions, but it might well be ten years.
　　It is a bad practice to grow the same crop in a field year after year. If the crop is changed, the land will suffer less because it is treated and used in a different way. Different plants have different effects on the soil. Therefore, a change ofcrop will do less harm than the growing of the same crop year after year and a regular change to grass will do good to the soil. Much will therefore be gained if different crops are grown one after another, a method known as the rotation(轮作)of crops.
　　72. According to the passage, the land will become poorer __.
　　A. if all the dead leaves are cleared away
　　B. if the humus is increased after the harvest
　　C. if dead leaves decay in the soil by themselves
　　D. if waste plant material lying about is buried
　　73. We can learn from the passage that the tired land has gradually recovered __.
　　A. when grasses and other plants appear again
　　B. when the treatment is given by nature alone
　　C. after new grasses and other plants have decayed again
　　D. after nature has been left alone for several months
　　74. A modern farmer can hardly move to another place as he did before because __.
　　A. the productive power of a new field isn’t higher than that of an old one
　　B. there are few free fields left for him to do farming
　　C. it takes a farmer more than ten years to start farming in a new field
　　D. there will be too many grasses in a new field to grow crops
　　75. It is most likely that the author will go on to ____ in the paragraph following the passage above.
　　A. introduce other methods of planting crops
　　B. deal with how to prevent land getting tired
　　C. start another topic of how to make use of land
　　D. furtherexplain what the rotation of crop is
　　参考答案：56-60.BCABB 61-65.BDADD 66-70.AAACD 71-75.BACBD

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