单项选择题

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

A．Business associates.
B．Boss and secretary.
C．Teacher and student.
D．Good friends.

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问答题

A series of experiments described in the passage is to examine whether thought and behavior can ______.

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