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Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．Their comprehensiveness.
B．Their complexity.
C．Their abstruseness.
D．Their openness.

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Ordinary people laugh a lot when they are alone.

Passage TwoQuestions 29 to 31 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。