题目内容
【题目】根据短文内容，从短文后的选项中选出能入空白处的最佳选项。选项中有两项为多余选项。
Did you know that if you need an alarm clock to wake up in the morning, you’re probably sleep-deprived （缺失）? __【1】_______ . On average, American teens get two hours less than the average 9.2 hours of sleep they need each night to function at their best.
There are many reasons why teens don’t get enough sleep. ____【2】______ . When your parents were young, they might have read a book or watched television before trying to go to sleep. But today’s teens are likely to be surfing the Internet, texting, emailing, or playing video games right before bed. ___【3】_____ . And using them right before bed can result in difficulty getting to sleep. According to a survey by the National Sleep Foundation, teens with four or more electronic equipment in their rooms are much more likely than their peers to get an insufficient amount of sleep at night, and are almost twice as likely to fall asleep in school and while doing homework.
___【4】______ . In the National Sleep Foundation survey, three-quarters of the teens took at least one drink with caffeine every day, and nearly one-third consumed two or more every day. With all the trendy “high-energy” drinks and coffees out there right now, it’s easy to get a caffeine overload and that’s not good for sleep.
So what can you do if you’re in lack of sleep? “The good news is that you only have to make up about a third of what you have lost, to function and feel better,” says Dr. Mahowald at a sleep disorders center. ____【5】______ . But sleeping until noon on the weekend can cause problems — you’ll likely be wide-eyed until late those nights. Instead, try keeping a reasonable, regular sleeping and waking schedule.
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.
【答案】
【1】C
【2】A
【3】E
【4】D
【5】B
【解析】
试题分析：文章讲述的是青少年需要充足的睡眠，现在有很多原因会导致青少年晚睡熬夜，如上网，打游戏或者喝咖啡等。文章建议青少年保持一个合理的，定期的睡眠和醒来的时间表。
【1】C 考查对上下文的理解和推理判断能力。根据下一句：On average, American teens get two hours less than the average 9.2 hours of sleep they need each night to function at their best.（平均来说，美国青少年比他们需要的以达到最佳状态的平均9.2个小时的睡眠时间少两个小时。）可知，此处的内容是讲现在的青少年睡觉睡的不够。故选C。
【2】A 考查对上下文的理解和推理判断能力。根据上一句：有很多原因导致青少年没有得到足够的睡眠。根据下面内容讲“当你的父母还年轻的时候，他们可能读书或看电视，之后去睡觉。”以及“但是，今天的青少年可能会上网，发短信，发邮件，或者打游戏睡觉前。”可知，此处的内容是其中原因之一，是一个相对的新的发展的时代。即与父母的年代不同。故选A。
【3】E 考查对上下文的理解和推理判断能力。根据上一句：但是，今天的青少年可能会上网，发短信，发邮件，或者打游戏睡觉前。可知此处的内容是电子设备比看书看电视更令人兴奋。故选E。
【4】D 考查对上下文的理解和推理判断能力。根据下一句：在全国睡眠基金会的调查中，四分之三的青少年每天至少喝一杯咖啡，每天几乎有三分之一的人每天两次或更多。可知此处的内容是许多青少年也喝太多的咖啡因所以睡不好觉。故选D。
【5】B 考查对上下文的理解和推理判断能力。根据上一句：好消息是，你只需要弥补你失去的三分之一，你的状态和感觉会更好。可知此处的内容是那些在星期六和星期日的早晨额外的睡眠时间真的有帮助。故选B。
