单项选择题

What is the main idea of the passage

A．All senses have their limitations.
B．Insects are more sensitive to colours than man.
C．Man has not fully utilized all his senses.
D．Man is not as good as animals in learning about the environment.

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单项选择题

Which of the following represents the author's view about the American culture

A．The fast pace produces nothing but ulcers and high blood pressure.
B．It is not clearly told in the passage.
C．The fast pace permits technological and scientific progress which benefits all people.
D．He is not quite sure whether the American culture is agreeable.

单项选择题

Which could be the best title for this passage

A．American Culture.
B．Benefits of Future Orientation.
C．The Regulation of Time.
D．Time and Culture.