单项选择题

Questions 23～25 are based on the following conversation. Nuclear family may consist of ______.

A．parents and their children
B．wife and husband
C．a parent and children
D．all of the above

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单项选择题

单项选择题

Questions 23～25 are based on the following conversation. Nuclear family may consist of ______. 您的浏览器不支持 audio 元素。