We had known for along time that flowers of different plants open and close at different t

We had known for along time that flowers of different plants open and close at different time of day. Yet no one really understands why flowers open and close like this at special time. The question is not as simple as we might think, as recent experiments have shown. In one experiment, flowers were kept in constant (持续的）darkness. We might expect that the flowers ,without any information about the time of the day, did not open as they usually do. In fact, they continue to open at their usual time. This shows that they have some special ways of knowing the time. Their sense(感觉) time does not depend on information from the outside world. It is inside them: a kind of inner (内部的）clock. This discovery may not seem to be very important. However, it is later found that not just plants but animals have this inner clock which control（控制）the working of their bodies and influences their activities. Human beings, then, are also influenced by it. Whether we wish or not, itaffectssuch things in our life as our need for sleep or need for food.
【小题1】Before the experiment arrived at a conclusion, people had thought that the flowers would .A．never open in constant darknessB．change their usual time to openC．open ahead of the time as they usually didD．continue to open at usual time【小题2】The sense of time that flowers have is connected with .A．its age and sizeB．light and temperatureC．a kind of strange power(力量）inside themD．some unknown information from the outside world【小题3】What will happen if we make good use of the inner clockA．We'll need less sleep or food.B．We'll be able to sleep as long as we wish to.C．We'll be able to change our work time when necessary.D．We'll have more energy to do our work better.【小题4】What's the Chinese meaning of the underlined word affectsA．产生B．影响C．给予D．依赖A

(答案→)A 解析：本篇文章从对开花时间的研究引出植物和人类都有生物钟这个结论。【小题1】A 细节题。根据In one experiment, flowers were kept in constant (持续的）darkness. We might expect that the flowers ,without any information about the time of the day, did not open as they usually do.可知答案为A.【小题2】C细节题。根据Their sense(感觉) time does not depend on information from the outside world. It is inside them: a kind of inner (内部的）clock.可知答案为C.【小题3】D推断题。根据However, it is later found that not just plants but animals have this inner clock which control（控制）the working of their bodies and influences their activities. Human beings, then, are also influenced by it.可推断如果我们好好的利用生物钟，我们就有更多的精力工作。【小题4】B猜词题。不管我们是否希望，生物钟影响了我们睡觉吃饭那样的事情。

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