单项选择题

What is the main idea of the passage

A．It is difficult to tell someone's personality.
B．It is difficult to describe someone's face.
C．It is difficult to recognize fingerprints.
D．It is difficult to know what someone else thinks about.

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单项选择题

By using the terms bookworms, fools, hard-working types , the author ______.

A．wants to tell us people are working hard
B．pictures people' s fingerprints
C．takes for example some terms for people' s behavior
D．makes fun of others

单项选择题

According to the passage, people have the ability to recognize others by ______.

A．their hands
B．their names
C．their voices
D．their faces