6．Cellphones are keeping children and teenagers awake at night．Researchers made a study of children and teenagers aged 6 to 19．According to the study 72% of the children use their cellphones in their sleep environment．And they also have found a"strong connection"between the use of cellphones at bedtime and poor sleep．
One reason is not just that kids are sleeping too late with cellphones．Using them can also excite the children's mind too much．The light from a smartphone influences how the body normally works and then leads to poor sleep．So many kids could be at risk．
Getting good sleep is very important for learning difficult subjects like math and foreign languages．
The American Academy of Pediatrics （AAP） suggests that kids should stop looking at cellphones at least half an hour before bedtime，because this helps their brains slow down and gets their bodies ready for sleep．
If you want to pick up a cellphones at bedtime，try the following activities instead：
•Keep a diary：Thoughts and worries can make you anxious at night．Writing thoughts on paper can clear your mind．
•Try a mind exercise：Close your eyes and count backward from 100 to 1．
•Just relax：Breathe in and out slowly and deeply．Sweet dreams!
Choose the right answer according to the passage．
46．According to the study，what is the percentage of the children who use their cellphones in their sleep environment？C
A.27%
B.6%
C.72%
D.19%
47．Why does AAP suggests that kids should stop looking at cellphones at least half an hour before bedtime？A
A．Because this helps their brains slow down and gets their bodies ready for sleep．
B．Because it is harmful for their eyes．
C．Because they need sweet dreams．
D．Because thoughts and worries can make them awake．
48．What is the meaning of the underlined word"anxious"？B
A．happy
B．worried
C．relaxed
D．surprised
49．If you want to pick up a cellphone at bedtime，try the following activities EXCEPTD．
A．keeping a diary
B．trying a mind exercise
C．just relaxing
D．listening to rock music
50．The passage is mainly aboutA．
A．cellphones and sleep
B．sweet dreams
C．the use of technology
D．the life of children and teenagers．
分析 文章大意：
文中提到的是手機和孩子的睡眠問題．晚上玩手機會影響孩子們的睡眠，給他們的生活及學習造成影響，為了保證合理的睡眠質(zhì)量，專家建議睡前不要玩手機，并且要盡量放松．
解答 46．C，細節(jié)理解題，文中提到"72% of the children use their cellphones in their sleep environment"72%的孩子在睡眠環(huán)境中使用手機，由此確定選擇C．
47．A，細節(jié)理解題，文中提到"kids should stop looking at cellphones at least half an hour before bedtime，because this helps their brains slow down and gets their bodies ready for sleep"科學家建議孩子們應該在睡前至少半小時內(nèi)停止看手機，因為這樣可以幫助他們的大腦慢下來，讓自己的身體準備睡覺"，由此確定選擇A．
48．B，詞義猜測題，文中提到"Thoughts and worries"思考和擔心會讓你覺得anxious，因為是擔心，所以推測其意思為焦慮，擔心，選擇B．
49．D，細節(jié)理解題，文中提到為了有利于睡眠，建議了三種方式，分別是記日記，思維訓練和放松，由此確定選擇D，不應該聽搖滾樂．
50．A，主旨大意題，文中提到"they also have found a"strong connection"between the use of cellphones at bedtime and poor sleep"科學家找到了手機和影響睡眠之間的直接關(guān)系，下文也在說手機如何給孩子的睡眠造成影響及合理的解決辦法，由此推測選擇A．
點評 對于閱讀表達題，一定要記得首先通讀全文，了解文章大意，然后再根據(jù)文章關(guān)鍵詞，關(guān)鍵句，掌握細節(jié)問題，并進行推理判斷，再去回答具體的問題．
