单选题 British teenagers are damaging their health by not getting enough sleep because they are distracted by electronic gadgets in their bedrooms, according to a survey on Tuesday.
The Sleep Council said "junk sleep" could compare with junk food as a major lifestyle matter for teenagers' parents.
The poll of 1,000 teenagers aged 12 to 16 found that 30 percent managed just 4 to 7 hours' sleep, even though they are advised to sleep 8 or 9 hours.
Almost a quarter said they fell asleep more than once a week while watching TV, listening to music or using other electronic gadgets.
"This is a really worrying trend," said Dr Chris Idzikowski of the Edinburgh Sleep Centre.
"What we are seeing is the result coming out of 'junk sleep' . It has neither length nor quality, both of which are important to feed the brain with the rest it needs to perform properly at school. "
Nearly all the teenagers had a phone, music system or a TV in their bedrooms, and about two-thirds of the teenagers had all three of these things.
Almost one in five teenage boys said the quality of their sleep had been influenced by their TVs or computers being left on. The survey also found that 40 percent of teenagers felt tired each day, with girls aged 15 to 16 feeling the worst.
However, only 11 percent said they were bothered by the lack or bad quality of sleep.
"I'm staggered that so few teenagers make the link between getting enough good quality sleep and bow they feel during the day," Idzikowski said. "Teenagers need to realize the fact that to feel well, perform well and look good, they need to do something about their sleep. /

单选题 The best title for the passage is ______.

【正确答案】 C

【答案解析】[解析] 主旨题。British teenagers are damaging their health by not getting enough sleep because they are distracted by electronic gadgets in their bedrooms，according to a survey on Tuesday．A选项过于狭窄；B选项没有突出文章主题中除了lack of sleep还有bad quality of sleep；D选项过于宽泛。

单选题 We can inter from the passage that ______.

【正确答案】 A

【答案解析】[解析] 推断题。“what we are seeing is the result coming out of 'junk sleep'. It has neither length nor quality, both of which are important to feed the brain with the rest it needs to perform properly at school．”垃圾睡眠既缺乏长度又没有质量，而这两者都为大脑提供了要在学校表现良好所必备的休息。可以推断出垃圾睡眠导致大脑不能很好的休息。和选项A的内容相符。

单选题 The meaning of the word "staggered" is ______.

【正确答案】 C

【答案解析】[解析] 词义题。根据下文中“Teenagers need to realize the fact that to feel well, perform well and book good, they need to do something about their sleep.”，以及前文中40%和11%这两个数据的强烈对比，可以判断目前很多青少年觉得白天时疲劳，感觉糟糕，但他们很多人却不能认识到睡眠和白天的心情和表现之间的联系，推测这里的staggered意思上和shocked最接近，都表示“吃惊的”。

单选题 The purpose of this passage is to ______.

【正确答案】 C

【答案解析】[解析] 主旨题。A选项过于夸张，文章中只提到lack of sleep，但并不意味着要sleep as much as possible；B选项内容slay up late at night没有突出文章主题，即青少年因为受到电子器具诸如电视、电脑等的干扰而睡眠短缺；D选项和文章主题不符。

单选题 According to the passage, which of the following statements is NOT true?

【正确答案】 D

【答案解析】[解析] 细节题。D选项中的most teenagers和Almost one in five teenage boys said the quality of their sleep had been influenced by their TVs or computers being left on. 中的one in five相互矛盾。A选项和第二段中的"junk sleep" could compare with junk food as a major lifestyle matter一致；B选项和第三段中的they are advised to sleep 8 or 9 hours，一致；C选项和文章主题一致。