共用题干 It is well一known that life expectancy is longer in Japan t

共用题干 It is well一known that life expectancy is longer in Japan than in most other countries.A______(51) report also shows that Japan has the longest health expectancy in the world.A healthy long life is the result of ___________(52)in social environment.Scientists are trying to work___________(53)exactly what keeps elderly Japanese people so healthy,and whether there is a lesson to be__________(54)from their lifestyles for the rest of us. Should we_________(55) any changes to our eating habits,for instance,or go jogging each day before breakfast?Is there any secret ingredient in the Japanese diet___________(56)is particularly beneficial____________(57)the human body?Another factor contributing to the rapid population aging in Japan is a___________(58)in birthrate. Although longer________(59)should be celebrated,it is actually considered as a social problem.The ___________(60)of older people had doubled in the last half century and that has increased pension and medical costs.The country could soon be__________(61)an economic problem,if there are so many old people to be looked____________(62)and relatively few younger people working and paying taxes to support them._________(63)the retirement age from 65 to 70 could be one solution to the problem.Work can give the elderly a________(64)of responsibility and mission in life.It'S important that the elderly play active ___________(65)in the society and live in harmony with all generations. _________(57)

A.of

B.to

C.with

D.from

正确答案是B