单项选择题

What plays an essential role in making the nation prosperous according to this passage

A．Its money.
B．Its trade.
C．Its natural resources.
D．Its peopl
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单项选择题
The conservation mentioned in the passage includes the following EXCEPT ______.
A．natural resources
B．human welfare
C．human life
D．concentration of wealth
单项选择题
What may contribute to the unfair use of concentrated power and wealth by some people
A．Their greed for profit makes them ignore the expense.
B．They have accumulated too much wealth and power.
C．They make profits by pretending to be blind.
D．They make profits by cheatin
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