9. A. head 　　　　　　　　　　　　 B. arm 　　　　　　　　　　　 C. body 　　　　　　　　　　 D. foot

8. A. harmful 　　　　　　　　　 B. careful 　　　　　　　　 C. wonderful 　　　　　 D. skillful

7. A. stand 　　　　　　　　　　　 B. state 　　　　　 　　　　 C. post 　　　　　　　　　　　 D. position

6. A. commending 　　　　 B. mending 　　　　　　　 C. recommending 　　　　　 D. communicating

5. A. biological 　　　　　　　　 B. physical 　　　 　　　　 C. psychological 　　　　　　　 D. logical

4. A. thrown 　　　　　　　　　　 B. caught 　　　　　　　　 C. seen 　　　　　　　　　　　　　　　 D. published

3. A. advise 　　　　　　　　　　 B. talk 　　　　　　　 　　　　 C. suggest 　　　　　　　　　　　　 D. say

2. A. does 　　　　　　　　　　　　 B. occurs 　　　　　　　　　 C. matches 　　　　　　　　　　　 D. dies

1. A. bad 　　　　　　　　　　　　　 B. good 　　　　　 　　　　 C. mean 　　　　　　　　　　　　　　 D. dead

20.D 为什么不允许(allow)你的孩子扔给狗一份生日礼物呢，而不是命令(order)，陪伴(accompany)，和取笑(tease)。

Passage 11

Here's a new warning from health experts: Sitting is deadly. Scientists are increasingly warning that sitting for prolonged periods - even if you also exercise regularly - could be 　1　 for your health. And it doesn't matter where the sitting takes place - at the office, at school, in the car or before a computer or TV - just the overall number of hours it 　2　 　.

Research is preliminary, but several studies 　3　 people who spend most of their days sitting are more likely to be fat, have a heart attack or even die.

In an editorial 　4　 this week in the British Journal of Sports Medicine, Elin Ekblom-Bak of the Swedish School of Sport and Health Sciences suggested that authorities rethink how they define 　5　 activity to highlight the dangers of sitting.

While health officials have issued guidelines 　6　 minimum amounts of physical activity, they haven't suggested people try to limit how much time they spend in a seated 　7　 .

"After four hours of sitting, the body starts to send 　8　 signals," Ekblom-Bak said. She explained that genes regulating the amount of glucoseand fat in the 　9　 start to shut down.

Even for people who 　10　 　, spending long stretches of time sitting at a desk is still harmful. Tim Armstrong, a physical activity expert at the World Health Organization, said people who exercise every day - 　11　 still spend a lot of time sitting - might get more benefit if that exercise were spread across the day,　　 12　 in a single bout.

That wasn't 　13　 news for Aytekin Can, 31, who works at a London financial company, and spends most of his days sitting 　　14　 a computer. Several evenings a week, Can also teaches jiu jitsu, a Japanese martial art　 15　 wrestling, and also does Thai boxing.

"I'm sure there are some detrimental 　16　 of staying still for too long, but I hope that being 　17　 when I can helps," he said. "I wouldn't want to think the sitting could be　 18　 dangerous."

Still, in a study published last year that tracked more than 17,000 Canadians for about a dozen years, researchers found people who sat 　19　 had a higher death risk, independently of whether or not they exercised.

Figures from a US 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 　　20　 just how much sitting is dangerous, and what might be possible to offset those effects.