Question

American children aren't the only couch potatoes with nearly one third of children globally spending three hours a day or more watching TV or on computers, according to the study of over 70，000 teens in 34 nations.

From Argentina to Zambia, Regina Guthold of the World Health Organization in Geneva and her colleagues found most children weren't getting enough exercise and that it made no difference if they lived in a rich or a poor country.“With regards to physical activities levels, we did not find much of a difference between poor and rich countries，” Guthold said.“Growing up in a poor country does not necessarily mean that kids get more physical activities.”The study was published in The Journal of Pediatrics, looking at 72，845 schoolchildren aged 13 to 15 from North and South America, Asia, Europe，and the Middle East. The children were surveyed between 2003 and 2007.

The researchers defined adequate physical activity as at least an hour of exercise outside of gym class at least five days a week. Children who spent three or more hours a day watching TV，playing computer games, or chatting with friends—aside from time in school or time spent doing homework—were classified as sedentary.

The researchers found only one quarter of the boys and 15 percent of the girls were getting enough exercise by these definitions. A quarter of boys and nearly 30 percent of girls were sedentary and didn't get enough exercise with girls less active than boys in every country aside from Zambia.

Uruguay had the highest percentage of active boys, at 42 percent, while Zambia had the lowest, at 8 percent. Girls from India were the most active, with 37 percent meeting exercise recommendation, while girls from Egypt were the least active, with just 4 percent getting adequate exercise. Children in Myanmar were the least sedentary, with 13 percent of boys and 8 percent of girls classified as sedentary. The most sedentary nations were St. Lucia and the Cayman Islands, with 58 percent of boys and 64 percent of girls spending at least three hours a day in sedentary activities.

People show deep concern for kids' lack of physical activity in various nations. Why do they have a low level of physical activity? Guthold speculated(推测)that urbanization(都市化) could be a factor as well as access to cars and TVs.

16．If you are sedentary, you________．

A．are a diligent student spending much time doing homework

B．have at least an hour of exercise outdoors every day

C．like watching TV and playing computer games

D．spend a lot of time sitting down and not moving

17．Which statement is TRUE about the finding of the study, led by Regina Guthold?

A．Most children around the world don't meet the exercise recommendation.

B．Girls in every country are no more active than boys.

C．Children in rich countries relatively get less physical activities.

D．Only 4 percent of the girls from Egypt are not active in exercise.

18．Which could be the best title of the passage?

A．American children are addicted to TVs and computers

B．Nearly one third of children globally are couch potatoes

C．Effects of physical activities on health

D．Unimaginable standard of physical health

19．What would the writer be most likely to discuss in detail in the following paragraphs?

A．The suitable amount of physical activities for students.

B．Some of the factors for the popularity of cars and TVs among the kids.

C．The reasons behind the lack of physical activities.

D．The ways to make the most of physical activities.

Answer 1

一项面向34个国家7万多名青少年开展的调查显示，全球近三分之一的儿童每天看电视或玩电脑的时间达到三个小时甚至更多。

16．D　推理判断题。第三段提到：除了在学校或做作业的时间外，每天看电视、玩电脑游戏或上网聊天的时间超过三个小时的孩子被定义为“久坐不动的”。由此推断，如果你被认为是“sedentary”，你就是大部分时间坐着不动的人。

17．A　推理判断题。根据第二段内容“多数儿童都缺乏锻炼，而且这和他们生活在富国和穷国没有多大关系”及该段提及的调查的范围可推知A项“全球大多数儿童没有达到建议活动量”是正确的。B项可根据第四段末尾排除；C项可根据第二段前三句排除；D项可根据第五段第二句的后半句排除。

18．B　主旨大意题。第一段是全文的中心，根据第一段内容“一项面向34个国家7万多名青少年开展的调查显示，爱坐在电视机前的并非只有美国儿童，全球近三分之一的儿童每天看电视或玩电脑的时间达到三个小时甚至更多”，由此可知B项正确。

19．C　篇章结构题。最后一段提到：人们对各国儿童缺乏身体锻炼表示极大的关注，Guthold分析，除汽车和电视的普及外，都市化也是造成儿童缺乏身体锻炼的一个因素。由此推断接下来作者很可能会详细地讨论儿童缺乏身体锻炼背后的原因。