单项选择题

Why are senior citizens gaining social influence

A．Because the number of senior citizens is growing and because senior citizens are more active.
B．Because senior citizens have experience.
C．Because their average life span is longer.
D．Because they do more work now.

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单项选择题

How old are senior citizens

A．People of 65 years old.
B．People over 65 years of age.
C．People between 60 and 65 years old.
D．Retired peopl

单项选择题

Why is Argentina world-famous according to the passage

A．Because of its large number of sports fans and supporters.
B．Because of its successes in the football World Cup.
C．Because of its obvious position on the map.
D．Because of its excellence at most important sports.