单项选择题

A．Two different types of bones in the human body.
B．How bones help the body move.
C．How bones continuously repair themselves.
D．The chemical composition of human bones.
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单项选择题
A．He may convert it and use it as a restaurant.B．He may pull it down and build a new restaurant.C．He may rent it out for use as a restaurant.D．He may sell it.
A．He may convert it and use it as a restaurant.
B．He may pull it down and build a new restaurant.
C．He may rent it out for use as a restaurant.
D．He may sell it.
单项选择题
From the passage we can infer that real happiness of life belongs to ______.
A．workers and employers
B．higher up in their social status
C．better fellow-competitors
D．those who could keep far away from this competitive world
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