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

A．They feel irritable.
B．They feel depressed.
C．They feel shocked.
D．They feel isolated.

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What have made people certain of the purity of bottled water

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。