单项选择题

Why is adolescence a relatively short period of time in primitive societies

A．It takes children shorter time to mature,
B．Most children do not survive the harsh conditions.
C．Most teenagers become laborers rather than students.
D．There are no legal provisions in the primitive societies.

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单项选择题

Which of the following would be the best title for the passage

A．Various Kinds of Humor
B．Different Humor Strategies
C．Add Humor to Speech
D．Use Humor Effectively

单项选择题

Which of the following is TRUE according to the passage

A．One is considered to have reached adulthood when he has a driver's license.
B．One is not free from the restrictions of child labor laws until he can join the army.
C．No one can marry without the permission of his parents until the age of twenty-one.
D．In the late 19th century in the United States the dividing line between adolescence and adulthood no longer existed.