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

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热门试题

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.

单项选择题

What can be inferred from the passage

A．It is human nature to shift between self- doubt and blind pride.
B．Intense competition may contribute to economic progress.
C．The revival of economy depends on international cooperation.
D．A long history of success may pave the way for further development.