Read the passage carefully , then choose the correct answers
The car is one of the greatest inventions of the modern world . Cars convey us from place to place quickly . However , every year , road vehicles kill and injure thousands of people . Cars also produce poisonous gases that make people sick when they breathe them in . So , factories have to produce vehicles that are as safe as possible . Also , governments must make rules to make people safer drivers .
Today , cars are much faster than they were in the past . However , they are also stronger . Strong cars help protect people during accidents . Two other things that make cars safer are seat belts and air bags . Today , they also have much better brakes . Good brakes make it possible to stop very quickly .
