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  3. Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them. It’s alway

Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them. It’s alway

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问题     Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them.
    It’s always a good idea to put on your seat belt when you’re in a car. Why? Think about this example: You put an egg on a skateboard (滑板) and give it a push. If the skateboard hits a stone, it will stop, but the egg won’t. It will fly through the air, hit the ground and break.
    Now, think what would happen if you tied the egg to the skateboard. When the skateboard hits a stone, the egg won’t go flying. It will stay safely on the skateboard.
    Volvo, a famous Swedish carmaker, was the first to use seat belts in 1849. Air bags are also very important for car safety, because sometimes a seat belt isn’t enough. If the car is going really fast and runs into something, seat belts could even hurt the people who wear them.
    Most newer cars have air bags in front of and next to the seats. When a car hits something, its airbags will come out quickly — in less than one second — to keep the people inside safe.
We have to be careful in driving a car mainly because it could be ________.
选项 A、little fun
B、a pleasure
C、a lot of trouble
D、a great danger
答案D
解析 事实细节题。这篇文章讲述了增强驾车安全的两项措施——系紧安全带和安装气囊。文章首先以滑板上的鸡蛋作类比，介绍了安全带的工作原理和作用。随后指出安全带的不足并引出另一项新措施——安全气囊的使用，介绍了安全气囊对安全带的补充和对驾车安全所起到的重要作用。由题干中的We have to be careful in driving a car和后面的because可知本题提问必须小心驾车的原因。文章首句Cars are lots of fun. but they could also be dangerous(开车充满有趣，但同时也很危险)给出了其原因为dangerous时，即选项D所述。
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