第三部分 阅读理解（共20小题；每小题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A new study suggests that the more teenagers watch television, the more likely they are to develop depression （沮丧；抑郁）as young adults.
The researchers used a national long - term survey of adolescent health to investigate（调查）the relationship between media use and depression. They based their findings on more than four thousand adolescents who were not depressed when the survey began in 2000.
As part of the survey, the young people were asked how many hours of television or videos they watched daily. They were also asked how often they played computer games and listened to the radio. Media use totaled an average of five and one - half hours a day. More than two hours of that was spent watching TV.
Seven years later, in 2007, more than seven percent of the young people had signs of depression. The average age at that time was twenty -one.
The study didn’t explore if watching TV causes depression. But one possibility is that it was taking time away from activities that could help prevent depression.
Previous study found that people who describe themselves as happy spend less time watching television than unhappy people. The study found that happy people are more likely to be socially active to read, to attend religious services and to vote.
1. The result of the research seems to prove ________.
A. teenagers are more likely to develop depression than adults
B. other media uses do no harm to adolescents
C. TV probably causes teenagers to grow up with depression
D. those who don’t watch TV will not develop depression
2. We can learn from the survey that of all the media use ________.
A. computer games are teenagers’ favorite
B. most teenagers prefer to listen to the radio
C. teenagers enjoy watching TV very much
D. newspaper is not included in the survey
3. According to the passage, what kind of activity may help prevent depression?
A. Playing computer games.            B. Taking part in sports.
C. Listening to the radio.               D. Watching movies.
4. We can conclude that a teenager should ________.
A. play more video games instead of watching TV
B. be active in taking part in outdoor activities
C. be more active in watching educational TV programmes
D. attend religious services and care for politics