Figures from a U.S. survey in 2003-2004 found Americans spend more than half their time sitting, from working at their desks to sitting in cars.

Experts said more research is needed to figure out just how much sitting is dangerous, and what might be possible to offset those effects.

"People should keep exercising because that has a lot of benefits," Ekblom-Bak said. "But when they’re in the office, they should try to interrupt sitting as often as possible," she said.

1£®What is the best title for the text?

A. Not Sitting Too Much While Working      B. How To Avoid Sitting Too Much

C. Sitting Too Much Could Be Deadly          D. More And More People Sit Too Much

2£®According to the research,______________.

A. the more time you spend in exercising in a single bout, the healthier you will be.

B. those who often sit too much are more likely to grow fat or suffer from a heart attack.

C. regular exercise is effective to get rid of the side effect of sitting too much.

D. you had better sit for more than four hours in a single bout.