Researchers found that compared with teens who spent much of their free time in front of TV sets, those who were physically active often had higher self-respect, better grades and were less likely to have risky behavior like taking drugs, smoking, or drinking．The findings, based on a national survey of nearly 12,000 middle and high school students, were published in a journal．

"Across the board, children who engaged in any kind of activity were belier off than kids who watched a lot of TV," said study co author professor Penny Gordon Larsen of the University of North Carolina．

Other studies have linked certain content of television programs, such as violence and sex, to children's behavior．But beyond this issue, Gordon-Larsen said that kids who spend hours watching TV "miss opportunities" to develop skills, learn teamwork and have other experiences that their more active peers benefit from．

That doesn't mean, however, that kids have to be on the football team． The study found that some activities like skating and skateboarding——which adults sometimes frown upon——were also related to better self respect and less risk taking．

That skaters were better behaved than TV watchers might come as a surprise to some adults who consider these teens to be bad, according to Gordon-Larsen．Skateboarding is forbidden in many public areas, and some communities oppose building skating parks．But if kids who like to skate have nowhere to do it, "it's a shame," said Gordon-Larsen．

Not only should parents encourage their kids to engage iii the physical activities they enjoy, she said, but schools and communities should also do more to create opportunities for children to be active．

小题1:From the passage we know that          .

A．physically active kids get into less trouble

B．more skating parks are being built

C．kids who spend hours watching TV benefit a lot

D．kids who have nowhere to skate tend to take drugs小题2:If your kid is a football player, he is more likely to ____

A．get into the habit of smoking or drinking

B．develop teamwork spirit

C．have risky behaviors

D．fail in the schoolwork小题3:This passage is mainly written to ___     ．

A．offer some information to teachers and parents

B．persuade kids not to watch a lot of TV

C．urge the public to help children be active

D．show the author's concern about children's growth小题4:What does the underlined sentence "which adults sometimes frown upon" in the 4th paragraph mean?

A．Some adults don't understand the sports．

B．Some adults are impatient with kids．

C．Adults consider it dangerous to go skating or skateboarding.

D．Some adults think them related to bad behaviors.小题5:It can be inferred from the passage that          .

A．kids are not expected to be active by some parents

B．professor Penny is a famous writer and journalist

C．skateboarding is popular in schools and communities

D．kids are not encouraged to join the football team