【正确答案】 D

【答案解析】[听力原文] Recent studies of patients at sleep clinics have revealed significant facts about the causes of insomnia as well as ways to deal with it. It is no surprise that stress and depression are linked to insomnia. Also, insomnia may be caused by physical illness: itching, aches, asthma, arthritis. ulcer and. heart problem that involve shortness of breath or difficulty in breathing. What can you do if you suffer from insomnia? Two things: you can eat certain foods that will help you fall sleep and stay asleep. And you can do certain things that are sleep-inducing. Here are some guidelines: A. If you had a bad night sleep, don't stay in bed later than the next morning. B. Don't go to bed earlier the next night, stick to your usual bedtime and rising pattern. C. Don't nap during the day. Naps cut down on night sleep time. D. Never lie awake in bed for more than thirty minutes. By lying in bed sleepless, you can form an association between your bed and sleepless. E. Get as much exercise as possible, preferably in the morning. As for food intake to help you sleep, make sure that your diet is a balanced one and rich in tryptophan, an amino acid found in certain foods. The body can convert tryptophan to air tryptophan and then to serotonin, a body chemical crucial to the sleep process. If you include in your daily diet food high an tryptophan, such as apples, eggs, cheese, fish and meat and incorporate some of the sleep-inducing activities into your life, the chances are good that you will achieve a pattern of restful and suiting sleep. What is the talk mainly about? 对话讨论了失眠的各种原因和对付失眠的办法。

【正确答案】 D

【答案解析】[听力原文] Which of the following is not mentioned as an illness inducing insomnia? 从“insomnia may be caused by physical illness: itching, aches, asthma, arthritis. ulcer and heart problem that involve shortness of breath or difficulty in breathing...”可知D正确。

【正确答案】 B

【答案解析】[听力原文] What is the speaker's advice to insomniac who had a bad sleep? 从“Don't go to bed earlier the next night, stick to your usual bedtime and rising pattern. ”可知B符合条件。

【正确答案】 C

【答案解析】[听力原文] Why are the insomniac advised to include food high in tryptophan in their daily diet? 从“...and rich in tryptophan, an amino acid found in certain foods. The body can convert tryptophan to air tryptophan and then to serotonin, a body chemical crucial to the sleep process. ”可知。tryptophan色氨酸，an amino acid氨基酸，serotonin血清素。

【正确答案】 D

【答案解析】[听力原文] What is the speaker's attitude toward the future of the insomniac? 作者在此文中未表现出悲观或乐观或怀疑的态度，只是陈述失眠的各种原因和对付失眠的办法。