完形填空(阅读以下材料 回答第51——65题)It is well-known that life

完形填空(阅读以下材料，回答第51——65题)

It is well-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 some secret__________(56)in the Japanese diet that is particularly __________(57)to the human body?

Another factor___________(58)to the rapid population aging in Japan is a decline in birthrate. Although longer life should be celebrated,it is___________(59)considered a social problem. The number of older people had_________(60)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.

_________(51)

A.late

B.recent

C.contemporary

D.new