单项选择题

The author writes the passage ______.

A．to list the new values the United States must adopt
B．to explain the necessity to adopt new values
C．to tell the reader it is impossible to adopt new values
D．to state that new values have replaced the old ones

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单项选择题

We can conclude from this passage that number sense in animals appears to be ______.

A．restricted to about one dozen species or less
B．akin to a faculty possessed by men in all stages of development
C．present chiefly in winged creatures
D．related directly to preservation or offspring

单项选择题

What new values should Americans adopt

A．Conservation and cooperation.
B．Cooperation and competition
C．The need for jobs.
D．The freedom of the individual.