【题目】More and more people are taking their iPads to bed with them to surf the web, check facebook or send e-mails before switching off the light. But researchers are warning that the blue light their screens give off can stop users getting a good night’s sleep. That is because this type of light is similar to daylight, convincing the brain that it is still daytime. Blue light prevents the production of a brain chemical called melatonin, which helps us fall asleep. By contrast, light which is more orange or red does not prevent melatonin production, perhaps because our brains recognize it as a cue that the day ends.

Scientists have known for years that staring at screens late in the evening can affect sleep ---- they are television screens, computer screens or mobile phone screens. However, because mobiles and iPads are by nature portable ---- not to say addictive ---- more people are taking them into the bedroom. Users also tend to hold them much closer to their eyes than a computer or television screen.

Researchers are warning that looking at iPad displays for more than two hours leads to lower natural melatonin levels as the devices give off blue light. They say, “Turning off the devices at night is the final solution. But if you have to use these devices at night, dim the display to cut down irritation of the eyes and limit the time you spend on them before bed.”

They wrote in the journal Applied Ergonomics(应用人类工程学) that iPad makers should adjust the spectral power distribution(光谱功率分布) of the devices so that they affect the sleep patterns of users less.

It is not just a good night’s sleep that could be harmed by too much late night screen time. Researchers know that long-term harm to sleep patterns can lead to an increased risk of obesity and even cancers.

What’s the main idea of the passage?

A. Scientists are warning that blue light is bad for our health.

B. People should limit the use of electronic devices

C. Using iPads before bed can cause a poor night’s sleep.

D. Looking at screens of iPads increase chances of sleeplessness.

【题目】As we know, many teen celebrities(名人) feel and think that having a slimmer figure can do great good to them. But, does size really matter? Are teenage fans trying hard to become like their celebrity idols(偶像)? Do celebrities really have the power to influence people, especially teenagers?

For the longest time, many parents blame teen idols for influencing the way their kids act. Have you noticed how teens idolize the celebrities these days? Even, their personal affairs are being followed by kids these days. Take for example the case of Lindsay Lohan of Mary Kate Ashley. They are definitely famous teen stars. But, since they are trying to project an image to satisfy a lot of people in show business, their health and body suffer. Many kids are aware of this problem. But they are easily influenced by these celebrities to exercise and eat less.

It is a fact that the media, and especially famous teen celebrities, can influence people powerfully. But teenagers are easily influenced because teenage years are the period when our personality and identity developments take place. Teens watching TV shows and reading magazines are easily pulled into the dieting and harmful eating habits because the media have some ways to pull these acts. They use thin models and celebrities to endorse(做广告宣传) products or to star in an up-and coming shows or movies. With fierce competition, celebrities are forced to eat less and do extreme exercise routines to get the roles or offers that come their way.

Living in today’s time and generation is a bit disturbing to a lot of parents. Media, especially as well as the celebrities, have a very powerful influence to drive teenagers to good or bad. It’s good that we can control ourselves to avoid bad things from happening. If not, parents should really be aware and guide their teens to determine what’s in ad what’s out.

Whats the title of the passage?

A. Parents’ responsibilities.

B. Advice on self-control.

C. Bad influences of celebrities.

D. Media’s bad influences.

【题目】From the health point of view we are living in a wonderful age. A large number of once fatal illnesses can now be cured by modern drugs and surgery. But though the possibility of living a long and happy life is greater than ever before, every day we witness the incredible killing of people on the roads. Man is opposite to the motor-car! It is a never ending battle which man is losing. Thousands of people are killed each year and we are quietly sitting back and letting it happen.

It has been rightly said that when a man is sitting behind a steering-wheel(方向盘) , his car becomes the extension of his personality. There is no doubt that the motor-car often brings out a man's worst qualities. People who are normally quiet and pleasant may become unrecognizable when they are behind a steering-wheel. They are rude, ill-mannered and aggressive. All their hidden frustrations and disappointments seem to be brought to the surface by the act of driving.

The surprising thing is that society smiles on the motorist and seems to forgive the behaviour. Everything is done for his convenience. Cities and towns are made ugly by huge car parks.

It is high time a world law were created to reduce this senseless waste of human life. With regard to driving, the laws of some countries are not strict and even the strictest are not strict enough. A law which was universally accepted could only have a beneficial effect on the accident rate. Here are a few examples of some things that might be done. The driving test should be made to a fixed standard and far more difficult than it is; all the drivers should be made to take a test every three years or so; the age at which young people are allowed to drive any vehicle should be raised to at least 21 ; all vehicles should be put through strict annual tests for safety. Present drinking and driving laws (where they exist) should be mad much stricter. Driving speed should be limited on all roads. These measures may sound extremely severe. But surely nothing should be considered difficult if it results in reducing the annual toll of human life. After all, the world is for human beings, not motor-cars.

The main idea of this passage is______.

A. traffic accidents are mainly caused by motorists

B. thousands of people in the world are killed each year

C. only stricter traffic laws can prevent accidents

D. the laws of some countries about driving are too strict

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