(单选题)

What can we know about The Sleep Council’s survey?

A.Many people of the survey only sleep 4 to 7 hours.

B.Thirty percent of the respondents sleep 8 or 9 hours.

C.Over fifty percent of participants watch TV until sleep.

D.The major participants of the survey are adults.

参考答案：A

参考解析：

细节理解题。根据文章第二段第三句“Its survey of 1,000 teenagers aged 12 to 16 found that 30 percent managed just 4 to 7 hours sleep as opposed to the recommended 8 to 9 hours by the experts.”可知，调查中的30%的人只睡4-7小时，8-9小时是建议的睡眠时长，A项正确，B项错误。根据第二段最后一句“Almost a quarter said they fell asleep more than once a week while watching TV, listening to music or using other electronic products.”可知，看电视看到睡着的大约有四分之一，即25%，C项中的“Over fifty percent”错误；D项错误，受访者是青少年，而不是成人。故选A。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语