完形填空
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
Staying Active in Old Age Keeps People Mobile
People over 70 who aren't active are more likely to develop problems walking or climbing stairs within a few years,according to a new study.
These findings suggest that it's very important to stay _____1____in old age,study author Dr. Marjolein Visser told Reuters Health.
"Physical activity in old age is as important _____2____taking your medications(药物)," Visser noted. "You do not need to join an expensive, fancy sports club with high-tech(高科技的)equipment. Your body will already _____3____from regular walking."
Visser, a Dutch(荷兰的)scholar,explained that ____4_____active helps prevent people from becoming breathless during simple activities, increase muscle mass and strength,and maintain the balance people need to walk up stairs,for instance.
To investigate how important exercise is to older adults, Visser's team interviewed 3,075 men and _____5____between the ages of 70 and 79, all of whom said they had no problems walking one-quarter of a mile or climbing ____6_____. The investigators followed the subjects for 4-1/2 years, noting who developed problems ____7_____and climbing stairs.
During the study, 34 percent of men and 47____8_____of women said they began to struggle with walking and climbing stairs. People ____9_____were inactive were twice as likely to report these problems as people who said they got regular exercise.
People who didn't exercise but had active lifestyles appeared to be at a somewhat higher risk of developing ___10______walking and climbing stairs, relative to people who exercised _____11____. Still, leading an active lifestyle appeared to protect people _____12____problems better than being generally inactive, the researchers report in the Journal of the American Geriatrics(老年医学)Society Among people who were inactive, ___13______who walked even a little bit such as brisk(轻快的)walking for a little over an hour per week - were at a lower ___14______of mobility(可动性)problems. "
If you do not like to exercise or you cannot exercise___15______of serious health problems or functional limitations, do try to be as active as possible," Visser advised.
1 A young B new C still D active
2 A than B so C as D to
3 A suffer B benefit C result D start
4 A looking B appearing C seeming D staying
5 A children B people C women D youths
6 A mountains B stairs C trees D walls
7 A jumping B walking C running D jogging
8 A percent B numbers C hundreds D dozens
9 A which B whom C those D who
10 A symptoms B issues C problems D chances
11 A rarely B openly C exactly D regularly
12 A from B into C on D of
13 A these B that C few D those
14 A risk B part C way D share
15 A since B owing C because D due
