题型：阅读选择 题类：常考题 难易度：普通
北京市顺义区2016届九年级下学期中模拟考试英语测试
阅读下列短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。
Biting could be worrying
It makes our fingers look ugly. It's dirty. It could hurt a lot. But many people just can't stop doing it: biting their nails.
Up to 45 percent of teenagers in the UK bite their nails, the BBC reported. There are also many famous nail biters, including ex-British Prime Minister Gordon Brown and American singer Britney Spears.
There's nothing wrong with biting nails to keep them tidy. But it could get out of control.
Some people bite a nail not because it's too long, but because they are driving, reading, feeling stressed out, or just have nothing else to do.
The same could happen to skin picking and hair pulling. A normal behavior could become “pathological”(病态的), as experts say.
In 2013, the American Psychiatric Association labeled (把……列为) nail biting as an obsessive-compulsive disorder (OCD). People with this disorder may wash their hands too many times or have to line up their shoes in a certain way.
These behaviors have a lot in common. OCD is doing something normal and healthy too much, NPR reported.
But nail biting is different from other OCD behaviors in at least one way.
“In OCD, the behavior is really unwanted,” Carol Mathews, a psychiatrist（精神病医生）at the University of California, San Francisco, told NPR. People with OCD don't want to wash their hands over and over again. There is no fun in it. They just fear that if they don't do something, something else that's very bad will happen to them.
But nail biters enjoy it.
“It's rewarding. When you get the right nail, it feels good,” said Mathews.
Therefore some people argue that most nail biters are not having a problem as serious as a mental (心理的) disorder.
But anyway, it's still a bad habit. So what can we do to stop it?
Since most people bite nails as a way of relieving (缓解) stress, finding another way to relieve that stress could be useful, suggested Rochelle Torgerson, a doctor at the Mayo Clinic in the US. Try playing with your pen instead.
Besides, nail biters feel the urge (刺激，冲动) to bite if they find a small imperfect part of the nail, said Mathews. So always keep your nails in good shape.
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A. when you cross the road together with them. B. Children learn about road safety by watching others. C. After knowing about traffic rules, D. keep your children from getting hurt, E. When your children are a little older, |
Young children don't have the skills or knowledge to stay safe in heavy traffic. The following tips (忠告) will be helpful for you to keep your children safe in heavy traffic. {#blank#}1{#/blank#} As parents, make sure that you always set good examples. Your children will follow you and think it's OK to do like you. Teach your children to pay attention to traffic lights {#blank#}2{#/blank#} This helps them understand when it's safe to cross. Make sure that you walk between your children and the traffic, and hold their hands all the time.
{#blank#}3{#/blank#} you can start to tell them the importance of traffic knowledge. Let them start to understand the reasons why they need to be so careful. Talk with them about road signs and traffic rules.
Ask your children to play in a safe place. Never let them ride bikes on the road without an adult present at rush hour.
The most important thing you can do is {#blank#}4{#/blank#} so parents encourage them to follow traffic rules. {#blank#}5{#/blank#} they'll volunteer to obey them. In this way, they'll be careful enough to keep themselves away from danger.
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