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
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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
单项选择题
The description of Mr. Rustam Mamedov is ______.
A．an example of a typical long life among these people
B．an example of an unusual long life among these people
C．an explanation of why he is still healthy
D．an explanation of what way of life we should take
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