[填空题]

How old are the youngest schoolchildren learning Chinese

[单项选择]We have to realise how old, how very old, we are. Nations are classified as "aged" when they have 7 per cent or more of their people aged 65 or above, and by about 1970 every one of the advanced countries had become like this. Of the really ancient societies, with over 13 per cent above 65, all are in Northwestern Europe. We know that we are getting even older, and that the nearer a society approximates to zero population growth, the older its population is likely to be-- at least, for any future that concerns us now. 　　To these now familiar facts a number of further facts may be added, some of them only recently recognised. There is the apparent paradox that the effective cause of the high proportion of the old is births rather than deaths. There is the economic principle that the dependency ratio-- the degree to which those who cannot earn depend for a living on those who can--is more advantageous in older societies like ours than in the younger societies of the developing world, be
A. all developed nations without exception.
B. every one of Western European countries.
C. Germany, France, and the United Kingdom.
D. Sweden, Switzerland, and the United States.

[单项选择]

We have to realize how old, how very old, we are. Nations are classified as "aged" when they have 7 percent or more of their people aged 65 or above, and by about 1970 every one of the advanced countries had become like this. Of the really ancient societies, with over 13 percent above 65, all are in Northwestern Europe. We know that we are getting even older, and that the nearer a society approximates to zero population growth, the older its population is likely to be--at least, for any future that concerns us now.
To these now familiar facts a number of further facts may be added, some of them only recently recognized. There is the apparent paradox that the effective cause of the high proportion of the old is births rather than death. There is the economic principle that the dependency ratio--the degree to which those who cannot earn depend for a living on those who can--is more advantageous in older societies like ours than in the younger societies of the deve
A. an advanced society is to suffer a gradual change from young to old.
B. people under 60 in Europe all witnessed social reshaping.
C. the world conference about aging was held as a challenge to current policy.
D. a man aged thirty can expect to live up to ninety, and a woman still longer.