给本文选择一个合适的标题：
A. 什么是最好的生活
B. 就要适合自己
C. 最好的生活
D. 梭罗的一生
A．matingB．excitingC．warningD．boring
A. mating
B. exciting
C. warning
D. boring
A．George was coming.B．George was not here.C．The man saw George.D．The man wished to see
A. George was coming.
B. George was not here.
C. The man saw George.
D. The man wished to see George.
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A. Some historical documents may not be real.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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