单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Mary’s English teacher is Mark.
B．Mary’s Chinese teacher is Mark.
C．Mary and Mark are good friends.
D．Mary and Mark are office colleagues.

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单项选择题

填空题

Because people are eager to win, during an auction, the really competitive bidding usually occurs in _______________.

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。