Are you siting more than ever？Take a moment to think about your sitting activities.You're probably sitting while reading this.Sometimes you sit when you are driving or attending a meeting.Other times you sit when you watch a movie or play computer games.That undoubtedly a lot of sitting.The fact is，the amount of time spent sitting has increased over time.As of today，an adult will spend 56-86% of their daily time sitting.
   We know sitting too much is bad，and most of us naturally feel a little guilty（内疚的） after a long-time TV watching.But what exactly goes wrong when we park ourselves for nearly 8 hours a day？A study on nearly 8，000 adults suggests that there's a direct relationship between the tie spent siting and our risk of early death of any cause.As the total sitting time increases，so does the risk of early death.
   "Sit less，move more" is what the Heart Association encourages us to do.But this guideline is just too simple and abstract（抽象的） to make a difference.It is like telling someone to just "exercise" without telling them how.Exercise guidelines are always more practical.For example，the Center for Disease Control advises adults to do exercise for two hours and 30 minutes every week，plus muscle strengthening activities two or more days a jye.aiek.We need similar guidelines for sitting.
   To make up the weakness，a research team is working on more specific guidelines. "It would probably be like this：for every 30 continuous minutes of sitting，standup and move or walk for five minutes at a quick pace，" Diaz，the lead researcher said，adding that the study has put us a step closer to the satisfying（满意的） guidelines.But more researches are needed to confirm（证实） their ways.
（1）Which of the following is NOT a sitting activity？

D

D

A．Driving.
B．Watching a movie.
C．Playing computer games.
D．Walking around.
（2）What does the writer tell us in Paragraph 2？

A

A

A．The bad influence of sitting too much.
B．The feelings of sitting too much.
C．The time and ways of exercising.
D．The weakness of the guidelines.
（3）What does the underlined phrase "similar guidelines" probably mean in Paragraph 3？

C

C

A．simple guidelines.
B．abstract guidelines.
C．practical guidelines.
D．personal guidelines.
（4）What can we learn from the last paragraph？

C

C

A．The guidelines are already good enough.
B．Diaz is quite satisfied about the guidelines.
C．More researches are needed to better the guidelines.
D．Exercise guidelines are too difficult to use.
（5）The passage can be read in the part of

B

B

in a newspaper.
A．culture
B．health
C．business
D．history