单项选择题

Questions 18～21 are based on a conversation in a three-member family. How many children did Mary have

A．Two girls and one boy.
B．Two boys and one girl.
C．One girl and one boy.
D．Three boys and one girl.

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单项选择题

单项选择题

Questions 18～21 are based on a conversation in a three-member family. How many children did Mary have 您的浏览器不支持 audio 元素。