单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．The purpose of laughter.
B．The cause of laughter and its effects.
C．Why and when people laugh.
D．The origin of laughter.
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单项选择题
In this passage, which of the following is not mentioned as the one qualified to perform the wedding ceremony
A．A civil official.
B．A judge.
C．The bride’s father.
D．A priest.
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