单项选择题

What is the main subject of this passage

A．Mr. Mamedov's life.
B．A description of several societies where people live a long time.
C．Suggestions for how you can live a long life.
D．Hard physical work is a good way to live a long time.

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单项选择题

This article concludes that ______ contribute to the remarkable long life of these peoples.

A．moderate diets
B．clean mountain air
C．daily hard work
D．all the above factors

单项选择题

According to the anthor, people living in industrial societies______.

A．enjoy a longer and happier life
B．don't eat meat
C．suffer from urban pressures and pollution
D．have stronger blood and heart system