Question

7．Sitting for more than three hours a day can decrease a person's life expectancy（預期壽命）by two years，even if her or she is physically active and gets rid of （擺脫）dangerous habit like smoking，according to a study．Watching TV for more than two hours a day can worsen that problem，decreasing life expectancy by another 1.4 years．
The analysis comes just two years after Australian researchers found that people who said they watched TV for more than four hours a day were 46% more likely to die of any cause than people who said they spent less than two hours a day watching TV．Those watching TV more than four hours a day were also 80% more likely to die of cardiovascular （心血管的） disease．"Long-sitting behavior is something we need to take note of beyond telling people to get 30 minutes of activity a day，"said Peter T．Katzmarzyk，one of the lead researchers．But while the evidence of illnesses is increasing，it remains difficult for many people to find time to get on their feet，especially if they do desk jobs．
"Try to stand as much as you can，"Dr Katzmarzyk said．"Typically when you are on the telephone you can stand and use the speakerphone．Instead of e-mailing someone in the office，just get up and so to talk to them．"However，Dr Katzmarzyk added，standing shouldn't be alternative to exercising，but an alternative to sitting．"Several studies show that when you're sitting，your leg muscles are completely inactive，"he said．"When you're sitting and completely inactive，this is when you run into trouble managing blood sugar．"
25．What is the main idea of the first paragraph？C
A．Watching TV too long can worsen our mental health．
B．We should be active and give up smoking．
C．Sitting for too long a time can shorten one's life．
D．Smoking too much can be harmful to health．
26．The  researchers draw the conclusion of the effect of long-sitting behavior byA．
A．making comparisons（比較）          
B．listing figures
C．giving examples                   
D．classifying facts
27．What does  Dr Katzmarzyk think of long-sitting behavior？B
A．It warns  people to exercise 30 minutes a day．
B．It's a bad behavior worth considering seriously．
C．It can lead to death at once．
D．It is good for desk job workers．
28．According to Dr Katzmarzyk，if you are sitting all the time，you mayD．
A．phone your friends and talk about your problem
B．put on weight quickly and become more  inactive 
C．want to have more sugar for your meals
D．find it hard to keep your blood sugar proper．

Answer 1

分析 新的研究表明，久坐會縮短一個人的壽命，給人的健康帶來威脅．

解答 25．C 段落大意題．根據(jù)第一段第一句的 Sitting for more than three hours a day can decrease a person's life expectancy（預期壽命）by two years可知，久坐會縮短人的壽命． 
26．A 細節(jié)理解題．通過閱讀 people who said they watched TV for more than four hours a day were 46% more likely to die of any cause than people who said they spent less than two hours a day watching TV．Those watching TV more than four hours a day were also 80% more likely to die of cardiovascular （心血管的） disease．"可知，作者在第二段用比較的方式說明了久坐和人的壽命之間的關系． 
27．B 推理判斷題．根據(jù)文章第二段的Katzmarzy所說的話和最后一段的your leg muscles are completely inactive和this is when you run into trouble managing blood glucose（血糖）可知，久坐對身體不利，我們應該嚴肅對待這個壞習慣． 
28．D 推理判斷題．根據(jù)文章的最后一句When you're sitting and completely inactive，this is when you run into trouble managing blood sugar．"可知，Katzmarzyk人文，如果長時間坐著，人的血糖就會出現(xiàn)問題．

點評 本文是一個人物故事類閱讀理解，題目涉及多道細節(jié)理解題，做題時結合原文和題目有針對性的找出相關語句進行仔細分析，結合選項選出正確答案．推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據(jù)．