单项选择题

The human body has developed a system of nerves that enables us to （）.

A．stay relaxed
B．avoid pain
C．stand torture
D．feel pain

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单项选择题

What does tile writer mean by saying we pay for our sensitivity in the first paragraph（）

A．We have to take care of our sense of pain.
B．We suffer from our sense of feeling.
C．We should try hard to resist pain.
D．We are hurt when we feel pain.

单项选择题

Some people think （） about their rights than they do about their responsibilities.

A．so much
B．too much
C．much more
D．much too