The key to reaching or staying at a healthy weight is regular exercise and good eating habits. Teens should get 60 minutes or more of physical activity a day. Note the word “activity”. As long as you’re getting your body moving, it doesn’t have to mean doing complicated exercises or going to the gym (体育馆) every day. All that matters is that each week you get the right balance of activity, including aerobic (有氧健身法的) strength building, and flexibility (柔韧性) exercise. Make exercise a habit by scheduling some every day.

On days when you have soccer practice or an aerobics class, you may have no trouble exercising for an hour or more. But most of us are busy, and 60 minutes a day of activity seems like a lot of time. The good news is that it’s OK to divide it into shorter “exercise breaks” throughout the day. Just as you might have a healthy snack to stop yourself getting hungry, exercise snacks can keep energy level high. So get up 15 minutes earlier and do some yoga or other stretching (伸展) activity. Fast walk or jog (慢跑) for 15 minutes at lunch. Do the same thing after school ??????????or walk or bike home. Add to that taking the stairs, gym class, and walking between classes during the day, and you’ve probably reached your 60 minutes.

Here are 5 simple ways to make an exercise lifestyle change:

1. Start today. Go outside for a walk.

2. Take the stairs instead of the elevator.

3. Instead of driving, walk or bike to places like school or a friend’s house.

4. Clean your room or wash the car.

5. Limit your time watching TV, using the computer, or playing video games--and when you do play, try some games that get you moving.

The underlined phrase “exercise snacks” in the second paragraph probably means ________.

A. food eaten before exercise

B. food eaten during exercise

C. shorter “exercise breaks”

D. a new kind of exercise

Why should we have exercise snacks every day?

A .Because they can stop us getting hungry

B. Because they can keep energy level high

C. Because they can include many kinds of sports

D. Because they are more likely to relate to our daily life

Which of the following is NOT mentioned in the passage?

A. To go hiking on your holidays

B. To spend less time on computer games

C. To go to school on foot or by bike

D. To do some housework at home

What will be most probably discussed in the following paragraph?

A. Losing weight   B. Good eating habits   C. Exercising your brain  D. Outdoors exercise

What would be the best title for this passage?

A. Regular exercise    B. School exercise    C. Indoors exercise    D. Difficult exercises

With the rapid social development, the Internet now provides social networks that include online movies and videos.The major television networks have much less control over your mind and their broadcasts for entertainment and, more importantly, advertising.It has long been known that television’s audience will spend more time on the Internet than watching TV.People have found another means of entertainment by going to websites which seem to satisfy their specific interests more completely.This isn’t very good news for the television networks.

    The influence of people using DVRs (Digital Video Recorder) also has led to fewer and fewer viewers watching television commercials.Market research indicates the effectiveness of TV ads is getting weaker as a result.Many DVR owners are fast forwarding and skipping television commercials.With viewers now spending an average of four times longer on the Internet and more viewers avoiding commercials, this trend isn’t good for television’s advertising revenues(收益).

    Major TV advertisers know full well that their advertising dollars on TV aren’t as an effective investment as they once were.The major players in advertising have been moving towards the Internet as a serious alternative means of advertising.

    For thousands of people involved in Internet marketing, it’s history-making to share the revenue that previously all went to major television networks.There’s already a group of Internet marketers being paid a larger amount of advertising revenue.These are everyday people that work usually from home on their own.Advertisers can direct their advertising to websites where viewer types are more likely to be interested in their product or service.

    The development of the Internet and its role and change in our lives cannot be compared to any other form of media created throughout the history of mankind.

People are going to websites for entertainment because _______.

      A.they’d like to follow the last trend   

       B.there are fewer commercials

      C.there are more movies and videos   

       D.they can choose what meets their particular needs

We can learn from the second paragraph that ______.

      A.viewers are bored with television commercials 

       B.the television viewing time should be limited

       C.many television commercials are of poor quality

       D.there are more commercials on DVRs than on TV

It can be inferred from the passage that _____.

      A.people spend time on the Internet mainly for entertainment

      B.most people prefer to work at home nowadays

      C.the Internet will attract more and more advertisers

      D.the appearance of TV changed our lives

The passage mainly tells us ________.

      A.the rapid social development      

       B.the fast development of the Internet advertising

      C.the way to advertise on the Internet 

       D.the influence of television commercials

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