A、 Common insomnia.
B、 Sleep-including activities.
C、 Foods to help people sleep better.
D、 Causes of insomnia and ways to deal with it.

【正确答案】 D

【答案解析】解析：录音开头就指出本篇文章是要讨论causes of insomnia as well as ways to deal with it。

A、 Asthma.
B、 Aches.
C、 Ulcer.
D、 Anemia.

【正确答案】 D

【答案解析】解析：录音讲到会诱发失眠的身体疾病主要是那些会导致呼吸短促困难的itching，aches，asthma，arthritis，ulcer and heart problem等，anemia(贫血)不符合这种说法。

A、 Go to bed earlier the next night.
B、 Go to bed as usual the next night.
C、 Take a nap the next day.
D、 Sleep late the next few days.

【正确答案】 B

【答案解析】解析：录音中建议失眠的人保持usual bedtime and rising pattern。

A、 Because tryptophan can balance their diet.
B、 Because tryptophan is an amino acid found in certain foods.
C、 Because tryptophan is crucial to the sleep process.
D、 Because tryptophan can cure insomnia altogether.

【正确答案】 C

【答案解析】解析：录音中讲到人体可以将tryptophan转化成对于睡眠非常重要的化学元素serotonin。

A、 Pessimistic.
B、 Optimistic.
C、 Doubtful.
D、 Indifferent.

【正确答案】 B

【答案解析】解析：录音最后讲到经过调整the chances are good that you will achieve a pattern of restful andsuiting sleep，由此可知叙述者的态度是很乐观的。