第37题: [单项选择]According to the author, many sleeping disorders are caused by ______. A. bad eating habits B. pre-bedtime exercises C. improper sleep patterns D. chronic fatigue syndrome 参考答案:C 答案解析:细节推理题。根据第三段第四句“But Many Problems are caused by staying up late and sleeping in,…”可知,导致睡眠问题的主要因素应该是不合