单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now, listen to the passage.
According to the speaker, sleeping pills may ______.

A．ease insomnia
B．help keep the body’s natural rhythm
C．lead to worse insomnia
D．have no effect at all

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单项选择题

单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. According to the speaker, sleeping pills may ______. 您的浏览器不支持 audio 元素。