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

单项选择题No one can expect to fully enjoy the adulthood privileges until he is ______. A) twelve years old C) eighteen years old B) sixteen years old D) twenty-one years old

单项选择题To make your humor work, you should ______. A) identify with your audience C) make fun of the disorganized people B) show sympathy for your listeners D) take advantage of different audiences