【C13】
A. sold
B. added
C. bought
D. enlarged
【C13】
A. vulnerable
B. available
C. endurable
D. favorable
【C12】
A. intelligence
B. imitation
C. impulse
D. impression
We can conclude from this article that
A. growing old is inevitable.
B. population aging is changing the society.
C. the elderly will show rapid physical and mental decline.
D. global aging is a disaster.