The pursuit of leisure on the part of the employees will certainly not ______ their prospect of promotion.

A．spur

B．further

C．induce

D．reinforce

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• She was very interested in the work of certain charities, and made a regular _______ to them.

  A．tribe

  B．attribute

  C．contribution

  D．tribute

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• Nuclear power's danger to health, safety, and even to life itself can be summed up in one word: radiation.

  Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It cannot be seen or heard, or touched or tasted, even though it is all around us. There are other things like that. Radio waves are all around us but we cannot detect them, sense them, without a radio receiver. Similarly, we cannot sense radioactivity without a radio detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other things.

  At very high levels, radiation can kill an animal or human being outfight by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hurt anything important, the damage may not be significant. This is the case when only a few are hit, and if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.

  This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be radiated and feel fine, then die of cancer five, ten or twenty years later as a result.

  Radiation can hurt us. We must know the troth.

  The second paragraph tells us that ______.

  A．nuclear radiation is invisible but harmful

  B．nuclear radiation is detected only by a receiver

  C．radio waves are harmless

  D．radio waves are mysterious

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• He failed to supply the facts relevant ________ the case in question.

  A) for

  B) with

  C) to

  D) of

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• 听力原文： The economic costs of noise to society are several. Airports are currently operating at less capacity because of noise regulations which restrict their hours of operation．For instance, at Washington's National Airport jet traffic is not allowed from 11 pm to 7 am. Other airports restrict the use of certain runways．One estimate is that noise restrictions reduce possible airport use by 20 percent．The profitable cargo trade is especially affected by night restrictions

  In the case of airports，jet engines may be modified to reduce their noise level．One estimate is that $5.7 billion would be required to equip all existing jet engines with noise control devices．However, even taking this step will not reduce noise levels at a11 points to acceptable values．some combination of methods is probably necessary．

  If all aircraft were made quieter by existing methods, there would be a number of economic benefits．An increase in airport capacity would occur. Property values near airports might rise．Transportation costs to and from airports could be reduced since the airports now could be located closer to population centers．

  Much research still needs to be done on the economic aspects of noise reduction and noise effects, Although some of the effects of noise pollution are known，more must be discovered about its effects on health， productivity，property values and the quality of life．Furthermore，the cost of noise pollution to the economy as a whole needs to be investigated．The public must be alerted to the dangers and economic costs of noise pollution so that people may make intelligent choices and exert appropriate pressures．

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  A．It is extremely dangerous to fly in the dark.

  B．Noise regulations restrict the hours of airport operation.

  C．Some of its runways are not in good condition.

  D．Cargo planes produce more disturbing noises at night.

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• As an excellent shooter, Peter practised aiming at both ________ targets and moving targets.

  A) standing

  B) stationary

  C) still

  D) stable

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