问题补充：
When US student Olivia Priedeman, 17, woke up one morning, she thought she had had a dream about making plans with a friend.
But it wasn’t a dream. Her phone showed that during the night, Priedeman had read a text message from her friend. She did it while she was fast asleep.
Reading and sending text messages while asleep—called “sleep texting”—is an unusual sleep behaviour, similar to sleepwalking. It’s also a growing concern(关心的事) among doctors: young people can’t live without their cell phones.
One in three teenagers sends more than 100 text messages a day, according to the Pew Internet & American Life Project. And at least four out of five teenagers said they sleep with their phone on or near their bed.
Elizabeth Dowdell, a professor at Villanova University in Pennsylvania, has studied sleeping texting. She said that having a phone nearby all night is a big part of the problem.
Andrew Stiehm, a sleep medicine expert with Allina Health in Minnesota, agrees. It’s possible for the part of the brain that controls motor skills (动作技能) to wake up, while the part of the brain that controls memory and judgment(判断) may be still asleep. That’s why some people can perform basic movements ---such as walking, talking, texting or even driving—while they’re sleeping. Some of Dowdell’s students said that they’re disturbed by their nighttime texting behavior. But because sleep texting is unconscious, it’s a difficult habit to break. Dowdell said she knows of some students who wear socks on their hands to keep themselves from texting.
Marjorie Hogan, a doctor at Hennepin County Medical Center in Minneapolis, Minnesota, suggests keeping all electronic devices(电子设备) outside the bedroom at certain times.
【小题1】What happened to Olivia Priedeman?A．She sleepwalked to a friend’s house.B．She dreamed of making plans with a friend.C．She phoned one of her friends during the night.D．She read a text message from her friend while asleep.【小题2】Which part the brain controls keeps awake while asleep?A．judgmentB．languageC．memoryD．motor skills【小题3】What does the underlined word “unconscious” mean?A．无法B．无意识的C．无反应的D．无规律的【小题4】What does doctor Hogan suggest people who sleep text do?A．Stop text during the daytime.B．Take some medicine to control the behaviour.C．Keep their phones out of their bedrooms while they sleep.D．Wear socks on their hands to stop themselves from texting.【小题5】We can learn from the passage that . A．It’s easy to give up a sleep texting habit.B．One in three teenagers has a sleep texting habit.C．Sleep texting can reduce the quality of one’s sleep.D．Sleep texting does more harm to one’s health than sleepwalking.D
答案：
(答案→)D
解析：这篇短文主要介绍了睡眠短信类似于梦游”是一种不寻常的睡眠行为。形成这种行为的原因是频繁的使用手机并发信息。专家说在睡眠中大脑控制运动技能的一部分是醒着的而大脑的控制记忆和判断一部分可能还在睡觉。所以出现了睡眠短信这一现象。
【小题1】细节理解题。根据短文第二段Her phone showed that during the night, Priedeman had read a text message from her friend. She did it while she was fast asleep.描述，那不是一个梦。她的手机显示,在夜间她读过从她的朋友发来的短信。她睡着的时候做的这件事。故选D
【小题2】细节理解题。根据短文It’s possible for the part of the brain that controls motor skills (动作技能) to wake up, while the part of the brain that controls memory and judgment(判断) may be still asleep.描述，有可能大脑控制运动技能的部分醒来,而大脑的控制记忆和判断一部分可能还在睡觉。可知在睡眠中大脑控制运动技能的一部分是醒着的，故选D
【小题3】词意猜测题。根据上下文可知因为睡眠短信是无意识,所以这是一个难以打破的习惯。故选B。
【小题4】细节理解题。根据根据最后一段描述，可知医生建议在睡觉时将所有电子设备移到卧室以外。故选C。
【小题5】是非判断题。根据But because sleep texting is unconscious, it’s a difficult habit to break.可知A错误，根据 One in three teenagers sends more than 100 text messages a day,可知B错误。根据第三段可知sleep texting is similar to sleepwalkin，故D项错误，根据短文大意，故C正确，故选C。
