C动词辨析。.A．stopped 停止；B．imagined 想象；C．enjoyed欣赏、享受；D．tried尝试；“我们总是回首希望我们能更长时间的来‘享受’童年。”故选C。

　　考点：富含人生哲理的议论文。

　　VI.阅读理解A

　　Some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings.

　　The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.

　　Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety－five would have the same effect.

　　Some scientists have suggested setting a noise limit of one hundred and twenty decibels in the oceans. They have observed that noises at that level can frighten and confuse whales(鲸鱼).

　　A team of American and Canadian scientists discovered that louder noises can seriously injure some animals.

　　The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales' ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed and become infected.

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