单项选择题

Which of the following is the topic of Paragraph 3

A．Some historical documents may not be real.
B．Some authors may not be honest.
C．Historians should be careful about their sources.
D．Historians may be influenced by their own backgrounds.

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单项选择题

In the first paragraph, the word yet is used to introduce ______.

A．contrast
B．a sequence
C．emphasis
D．an example

单项选择题

Scorates was condemned to death because he ______.

A．believed in law
B．was a philosopher
C．published radical philosophical articles
D．advocated original opinions