1 . Teenagers’ fitness is now a major concern，and physical exercise is very important. It reduces stress and improves fitness. Exercise makes your body strong，and helps you to keep the right body weight. Sports scientist Dr. Helen Lopez offers the following advice to teenagers：“First，you need to find out your present level of fitness. Then you can design a programme that will help you become healthier.”

Dr. Lopez suggests that there are three levels of fitness that need a change of lifestyle.“Overweight”means that the person gets very little exercise and often has a serious weight problem. “Inactive” means that the person does not join in many physical activities，but is not seriously overweight.“Active”refers to people who take part in sports and other physical activities，but do not have a high fitness level.

According to Dr. Lopez，overweight teenagers should work out to keep healthy.“Ride a bike，play volleyball or basketball for a while，and go for a twenty­minute walk each day. All these will help to burn calories.”Inactive teenagers should do similar activities, but add some bending and stretching exercises, such as push­ups and sit­ups, starting with twenty of each a day.“Inactive people can take a little more exercise than overweight people because their bodies are stronger，”Dr. Lopez said. The same rule applies to active teenagers.

Dr. Lopez suggests one hour a week or more on running and other forms of intensive exercise，together with fifteen minutes a day spent on stretching and bending activities.“These are really important in order to prevent injuries,” Dr. Lopez said. Some weight­training and other body­strengthening exercises could also be planned in the programme in order to increase the person’s strength.

1. What can we learn from the passage?

A．Active people always have a high fitness level.

B．Overweight people always take more exercise.

C．Keeping fit means changing teenagers’ lifestyle.

D．Inactive teenagers are not seriously overweight.

2. Which of the following is NOT mentioned in the text?

A．Physical exercise can make the teenagers grow taller.

B．Physical exercise can help teenagers become healthier.

C．Physical exercise can help to burn up calories.

D．Physical exercise can increase teenagers’ strength.

3. In order to prevent injuries you should do some ________．

A．walking exercises	B．streching and bending
C．riding	D．weight­training

4. What is the best title for the passage?

A．Doing Exercise

B．Teenagers’ Fitness

C．Different Lifestyles

D．Overweight Teenagers

2 . Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses （球场） in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.

1. Which of the following is the author most probably in favor of?

A．Cycling around a lake.

B．Motor racing in the desert.

C．Playing basketball in a gym.

D．Swimming in a sports center.

2. What do we know about golf from the passage?

A．It is popular in Portugal and Spain.

B．It causes water shortages around the world.

C．It pollutes the earth with chemicals and wastes.

D．It needs water and electricity to keep its courses green.

3. The author uses power walking as an example mainly because _________.

A．it is an outdoor sport

B．it improves our health

C．it uses fewer resources

D．it is recommended by experts

4. The author writes the passage to _________.

A．show us the function of major sports

B．encourage us to go in for green sports

C．discuss the major influence of popular sports

D．introduce different types of environment-friendly sports

3 . Training for a marathon (马拉松) requires careful preparation and steady, gradual increases in the length of the runs.     1    , buy the best-fitting running shoes you can find. No one can say which brand will work best for you or feel best on your feet, so you have to rely on your experience and on the feel of each pair as you shop. When you have found shoes that seem right, walk in them for a few days to double-check the fit.     2    . As always, you should stretch (伸展) at least ten minutes before each run to prevent injuries.

During the first week, do not think about distance, but run five minutes longer each day.     3    , it is wise to take a day off to rest. But during the next week, set a goal of at least a mile and a half per run.     4    . After two weeks, start timing yourself.     5    . Depending on the kind of race you plan to enter, you can set up a timetable for the remaining weeks before the race.

A．After six days

B．For a good marathon runner

C．Before you begin your training

D．With each day, increase the distance by a half mile

E．If they still feel good, you can begin running in them

F．Time spent for preparation raises the quality of training

G．Now you are ready to figure out a goal of improving distance and time