第6部分：完形填空（第51～55题，每题1分，共15分）

　　下面的短文有15处空白，请根据短文内容为每处空白确定一个最佳选项。

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________ （51） in old age, study author Dr. Marjolein Visser told Reuters Health.

　　"Physical activity in old age is as important________ （52） 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________ （53） from regular walking."

　　Visser, a Dutch （荷兰的） scholar, explained that________ （54） 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________ （55） between the ages of 70 and 79, all of whom said they had no problems walking one-quarter of a mile or climbing________ （56）. The investigators followed the subjects for 4-1/2 years, noting who developed problems________（57） and climbing stairs.

　　During the study, 34 percent of men and 47________（58） of women said they began to struggle with walking and climbing stairs. People________（59） 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________（60） walking and climbing stairs, relative to people who exercised________（61）. Still, leading an active lifestyle appeared to protect people________（62） 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,________（63） 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________（64） of mobility （可动性） problems.

　　"If you do not like to exercise or you cannot exercise________（65） of serious health problems or functional limitations, do try to be as active as possible, " Visser advised.

　　51 A young B new C still D active

　　52 A than B so C as D to

　　53 A suffer B benefit C result D start

　　54 A looking B appearing C seeming D staying

　　55 A children B people C women D youths

　　56 A mountains B stairs C trees D walls

　　57 A jumping B walking C running D jogging

　　58 A percent B numbers C hundreds D dozens

　　59 A which B whom C those D who

　　60 A symptoms B issues C problems D chances

　　61 A rarely B openly C exactly D regularly

　　62 A from B into C on D of

　　63 A these B that C few D those

　　64 A risk B part C way D share

　　65 A since B owing C because D due

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