【题目】Teeth are important. Strong , healthy teeth help you chew(咀嚼) foods that help you grow. They help you speak clearly. And yes, they help you look best. Here are some tips for you to take care of your teeth:
1.Brush your teeth the right way.
Brush your teeth at least twice a day – after breakfast and before bedtime. If you can, brush after lunch or after sweet snacks, too. Brush all of your teeth, not just the front ones. Spend time brushing teeth along the sides and back of your mouth. Spend at least three minutes each time you brush. Play a song you like to help pass the time. Get a new toothbrush every three months. When you buy toothbrush, be sure it has soft bristles(鬃毛).
2.Learn how to floss(用牙线清洁牙齿) your teeth.
Flossing is a very important way to keep your teeth healthy. Food may hide between two teeth. Flossing can help get rid of (清除) it. You’ll need to floss your teeth at least once a day.
3.Have good eating habits.
You need to be careful about what you eat and drink. Eating sugar is a major cause of tooth decay(蛀牙).Eat lots of fruits and vegetables and drink water instead of soda(苏打汽水).
根据短文内容，选择最佳答案。
【1】How many times at least should we brush our teeth a day?
A.1.B.2.C.3D.4.
【2】How often should we change our toothbrushes?
A.Never.B.Three times a month.
C.Every three months.D.Every month.
【3】The bristles of the toothbrush must be______.
A.hardB.softC.expensiveD.new
【4】What is the major cause of tooth decay?
A.Not brushing teeth.B.Not changing toothbrush.
C.Eating sugar.D.Not flossing teeth.
【5】Which is the right way to take care of teeth?
A.Only brush front teeth.
B.Don’t brush teeth before sleeping.
C.Spend at most three minutes to brush teeth each time.
D.Eat lots of fruits and vegetables and drink water instead of soda.
【答案】
【1】B
【2】C
【3】B
【4】C
【5】D
【解析】
这是一篇科普知识类阅读，主要介绍牙齿非常重要．坚硬、健康的牙齿能帮助你咀嚼助你成长的食物．它们能让你说话时口齿清晰．并且，它们让你拥有很好的容貌，作者给出了几个方法帮助我们保护牙齿．
【1】细节理解题．根据第二段第一句Brush your teeth at least twice a day-after breakfast and before bedtime每天早饭前和睡觉前至少刷牙两次．可知，每天刷2次牙，选B．
【2】细节理解题．根据第二段第二行Get a new toothbrush every three months．每三个月买一把新牙刷．可知，每三个月换牙刷，选C．
【3】细节理解题．根据第二段最后一句When you buy toothbrush，be sure it has soft bristles（鬃毛）．当你买牙刷，一定有柔软的鬃毛．可知，牙刷毛必须是软的．选B．
【4】细节理解题．根据最后一行Eating sugar is a major cause of tooth decay（蛀牙）．吃糖是蛀牙的主要原因．可知，是吃糖．选C
【5】细节理解题．根据最后一句Eat lots of fruits and vegetables and drink water instead of soda（苏打）．多吃水果和蔬菜，而不喝苏打水．可知，D选项"多吃水果和蔬菜，而不喝苏打水．"是照顾牙齿的正确方法．选D．
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【题目】 Dolphins are not fish. They are mammals. They live in groups and speak to each other in their own language. But they aren't the same as almost all land animals. Their brains are as big as men's and they live a long life--- at least 20 or 30 years.
Like some animals, dolphins use some sounds to help them find their ways around. They also use sounds to talk to each other and to help them find food. They don't use their ears to receive sounds, but use the jaws(下颚).
It's strange that dolphins are friendly to man, and for thousands of years, there are many stories about dolphins and man. In the 19th century, in a dangerous part of the sea near New Zealand, there was a dolphin. The seamen liked him very much and gave him a very good name, Jack. From 1871 to 1903, Jack met every ship in the area and showed it the way. In 1903, a passenger on a ship with the name of " The Penguin" shot and hurt Jack. Luckily the dolphin didn't die, and after a long time he was well again. He guided the ships through the area for nine more years, but he refused to help the ship " The Penguin".
Today, some people still kill dolphins, but more people in the world protect them.
根据短文内容，回答下列问题。
【1】Are dolphins fish or mammals?
__________________________________________________________
【2】What do dolphins use to receive sounds?
__________________________________________________________
【3】Where did Jack live?
__________________________________________________________
【4】Why did Jack refuse to help the ship "The Penguin"?
__________________________________________________________
【5】How many years did Jack guide the ships through the area in total(总共)?
__________________________________________________________
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【题目】Giving a Hand
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