Did you know that if you need an alarm clock to wake up in the morning,阅读理解答案_高考阅读理解

　　A. One of them is a relatively new development.

　　B．Those extra two hours of sleep on Saturday and Sunday mornings can really help.

　　C．Most teens don’t get enough sleep.

　　D．Many teens also drink too much caffeine to sleep well.

　　E．Electronic devices are more exciting than simply watching television.

　　F．Researchers also have found that biology plays a role in teens’ sleep patterns.

　　G．Many school districts are shifting their start times to later morning for school students.

　　CAEDB

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