Some people don't believe that driving more slowly can save lives．But the truth is that driving more slowly can help a person to avoid serious accidents．
The above chart（表格） shows the distance that it takes to stop a car at a given speed．The distance is measured in feet．The shaded area（阴影部分） shows the driver's thinking distance．That's the distance it takes for the driver to react to a danger that he sees．The white area shows the car's braking distance．That's the distance it takes for the car to stop once the brakes（闸、刹车） are used．The number at the top of each bar shows the total number of feet that it takes to stop the car
1.According to the chart, what is the total number of feet needed to stop a car that is traveling at 50 miles per hour?
A．55． B．73． C．128． D．183．
2.What is the braking distance for a car that is travelling at 60 miles per hour?
A．66 feet． B．119 feet． C．185 feet． D．251 feet．
3.Which of the following statements about braking and speed is true?
A．The braking distance is what it takes for the driver to react to a danger that he sees．
B．The speed of a car has a direct effect on the distance needed to stop the car．
C．The braking distance increases only when a driver drives faster than 50 miles per hour.
D．Driving slowly can help a person to avoid all accidents
There have always been a lot of commonly believed but exercise. Some people believe that they can’t help putting on hold that if they stop exercising, their muscles will turn into fat. Here are some more myths：
false ideas about being fat and doing weight as they get older, while others
I‘ll never lose weight一I come from a fat family
Wrong! While we can’t change the body type we are bom with, we can’t blame our genes for making us fat. There’s plenty of evidence that fatness runs in families, and the main reason is that they
share the same habits of eating too much and exercising too little.
I am fat because I burn calories slowly
Wrong! Fatness is not caused by a slow metabolism(新陈代谢). In fact, although fat people consume more energy than slim people，they also fail to realize how much they eat! Keeping a diary can help you work out your daily food intake more accurately.
Exercise is boring
Wrong! Anything will become boring if you do it repetitively. The key is to develop a balanced and varied program thafs fun as well as progressive. If you enjoy a Sunday walk，take a different route. If you do yoga，try a tai chi class. If you like swimming, set yourself a distance or time challenge.
No pain, no gain
Wrong! Exercise is not meant to hurt. Indeed, pain is your body telling you something’s wrong, and continuing to exercise could lead to serious injury. You may experience mild discomfort as you begin to exercise regularly, but this is your body adapting to the positive changes in your lifestyle and the aches should disappear relatively quickly. If they don’t, rest and seek medical advice.
1.What does the author think about being fat?
A.It is the family genes that make people fat.
B.People are fat because they consume too little energy.
C.A diary of exercise can prevent people from becoming fat.
D.It is the consequence of people’s unbalanced lifestyle.
2.According to the author, how can we make exercise more interesting?
A.By taking varied exercise. B.By choosing simple exercise.
C.By doing regular exercise. D.By sticking to outdoor exercise.
3.What is the author’s opinion about “No pain, no gain” in exercising?
A.Keeping fit is essentially a painful experience.
B.Exercise should be stopped if continuous pain is felt.
C.Pain in exercise is a precondition for reaching your goal.
D.Getting used to pain leads to positive changes in your body.
4.What is the purpose of the passage?
A.To declare the importance of keeping fit.
B.To clarify some misconceptions about fatness and exercise.
C.To confirm what has long been believed about keeping fit.
D.To explain some medical facts about being fat and doing exercise.