Getting less sleep has become a bad habit for most American kids.According to a new survey(調(diào)查) by the National Sleep Foundation,51% of kids aged 10 to 18 go to bed at 10 pm or later on school nights,even though they have to get up early.Last year the Foundation reported that nearly 60% of 7-to 12-year-olds said they felt tired during the day,and 15% said they had fallen asleep at school.

　　How much sleep you need depends a lot on your age.Babies need a lot of rest:most of them sleep about 18 hours a day!Adults need about eight hours.For most school-age children,ten hours is ideal(理想的).But the new National Sleep Foundation survey found that 35% of 10-to 12-year-olds get only seven or eight hours.And guess what almost half of the surveyed kids said they do before bedtime?Watch TV.

　　“More children are going to bed with TVs on,and there are more opportunities(機(jī)會(huì)) to stay awake,with more homework,the Internet and the phone,” says Dr.Mary Carskadon,a sleep researcher at Brown University Medical School.She says these activities at bedtime can get kids all excited and make it hard for them to calm down and sleep.Other experts say part of the problem is chemical.Changing levels of body chemicals called hormones not only make teenagers’ bodies develop adult characteristics,but also make it hard for teenagers to fall asleep before 11 pm.

　　Because sleepiness is such a problem for teenagers,some school districts have decided to start high school classes later than they used to.Three years ago,schools in Edina,Minnesota,changed the start time from 7:25 am to 8:30 am.Students,parents and teachers are pleased with the results.

　　【語篇導(dǎo)讀】研究表明,大部分美國孩子已經(jīng)形成了不良的睡眠習(xí)慣。他們?nèi)胨��?睡眠不足。其原因是電視、手機(jī)、網(wǎng)絡(luò)、作業(yè)等一些令他們興奮的事情影響了他們,導(dǎo)致身體內(nèi)激素水平的變化,進(jìn)而使得他們?nèi)胨�晚。�?duì)此,學(xué)校也采取了改變上學(xué)時(shí)間等措施來解決此類問題。

　　1.What is the new National Sleep Foundation survey on?

　　A.American kids’ sleeping habits.

　　B.Teenagers’ sleep-related diseases.

　　C.Activities to prevent sleeplessness.

　　D.Learning problems and lack of sleep.

　　答案　A

　　解析　細(xì)節(jié)理解題。根據(jù)后文的介紹可知,美國“全國睡眠基金會(huì)”的調(diào)查針對(duì)的是美國10至18歲少年睡眠時(shí)間不足的情況及其影響,而不是疾病、失眠或?qū)W習(xí)問題。故選A項(xiàng)。

　　2.How many hours of sleep do 11-year-olds need every day?

　　A.7 hours. B.8 hours.

　　C.10 hours. D.18 hours.

　　答案　C

　　解析　細(xì)節(jié)理解題。根據(jù)第二段中的“For most school-age children,ten hours is ideal.”可知,對(duì)于11歲的孩子來說,每天10小時(shí)的睡眠時(shí)間是最理想的,故C項(xiàng)正確。

　　3.Why do teenagers go to sleep late according to Carskadon?

　　A.They are affected by certain body chemicals.

　　B.They tend to do things that excite them.

　　C.They follow their parents’ examples.

　　D.They don’t need to go to school early.

　　答案　B

　　解析　細(xì)節(jié)理解題。根據(jù)第三段中的“...these activities at bedtime can get kids all excited and make it hard for them to calm down and sleep.”可知,孩子們不睡覺的原因是他們?cè)谒�前傾向于做一些令他們興奮的事情,故B項(xiàng)是根本原因。本題易誤選A項(xiàng),而根據(jù)“Other experts say...”可知A項(xiàng)所表述的并非是Carskadon的觀點(diǎn),故排除A項(xiàng)。

　　【長(zhǎng)難句分析】Because sleepiness is such a problem for teenagers,some school districts have decided to start high school classes later than they used to.

　　因?yàn)槭人瘜?duì)青少年來說是個(gè)問題,一些學(xué)區(qū)決定中學(xué)上課的時(shí)間比以前晚一些。

　　本句是一個(gè)復(fù)合句。because引導(dǎo)的是原因狀語從句,than引導(dǎo)的是比較狀語從句。

　　熱點(diǎn)推薦：

　　PETS二級(jí)考試閱讀詞匯匯總

　　公共英語二級(jí)閱讀理解專項(xiàng)試題（20套）

　　公共英語等級(jí)考試PETS1-PETS5模擬試題匯總（680套）

　　公共英語不用盲目備考，網(wǎng)校教研團(tuán)隊(duì)精心打造高通關(guān)套餐班，密訓(xùn)鎖分，保障快捷通關(guān)!2020年公共英語鎖分套餐班強(qiáng)勢(shì)推出，精銳老師分題型專項(xiàng)輔導(dǎo)，聽說讀寫穩(wěn)步質(zhì)變>>課程試聽！

　　想獲得更多公共英語考試復(fù)習(xí)資料？加入公共英語考試群424641146 有專業(yè)的老師為您解答問題，還可以和考友一起交流！