单项选择题

Which of the following would be the best title for the passage

A．Sex Ratio Changes in Human Evolution.
B．Ways of Continuing Man's Evolution.
C．The Evolutionary Future of Nature.
D．Human Evolution Going Nowhere.
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单项选择题
The author argues that our bodies have stopped evolving because ______.
A．life has been improved by technological advance
B．the number of female babies has been declining
C．our species has reached the highest stage of evolution
D．the difference between wealth and poverty is disappearing
单项选择题
What does the example of India illustrate
A．Wealthy people tend to have fewer children than poor people.
B．Natural selection hardly works among the rich and the poor.
C．The middle class population is 80% smaller than that of tribes.
D．India is one of the countries with a very high birth rate.
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