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  3. The undersea world is very beautiful. Now more and more people want to dive in the water to find the secrets there. Scuba diving

The undersea world is very beautiful. Now more and more people want to dive in the water to find the secrets there. Scuba diving

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问题     The undersea world is very beautiful. Now more and more people want to dive in the water to find the secrets there. Scuba diving is a new sport today. It can take you into a wonderful undersea world.
    You will find many strange animals in the sea. Some are as large as a school bus. Many sea animals give out light in the dark and some have sharp teeth.
    During the day, there is enough light. Here, under the sea, everything is blue and green. When fish swim nearby, you can catch them with your hands. When you have bottles of air on your back, you can stay in deep water for a long time. However, you can’t dive too deep. And you must be very careful when you dive in deed water.
    The deep sea is not an easy place to live in. It’s cold, and it’s dark, too. The deeper it is, the less sunlight there is. At about 3, 000 feet, there is no light at all. It is dark in the sea. Many fishes have no eyes. Some have big eyes. A few have eyes on one side.
    Besides (除了) the cold and darkness, deep -sea animals face a third danger - other animals.
    Animals eat! They must find food to eat. Many animals eat plants. However, some animals eat meat. This means these sea animals have two big jobs. They need to find animals as food, and they have to try not to become other animal’s, meal.
When you do scuba diving, you can_____.
选项 A、stay in deep water for a long time
B、dive very, very deep
C、live in deep water easily
D、dive freely without any dangers
答案A
解析 文章的第蔓段有这样一句话“When you have bottles of air on your back，you can stay in deep water for a long time”，背着空气瓶潜水就是“scuba diving”。
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