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Questions 14 ～ 17 are based on a talk between a doctor and his patient. What is the main cause of the patient’s trouble in sleeping

A．Taking improper sleeping medications.
B．Having unusual stress lately.
C．Having a poor digestion.
D．Having insufficient physical activities.

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单项选择题

单项选择题

Questions 14 ～ 17 are based on a talk between a doctor and his patient. What is the main cause of the patient’s trouble in sleeping 您的浏览器不支持 audio 元素。