Everyone knows that exercise is important. We all need to exercise. Doctors say it is good for us. It makes your heart and body strong. Children who often exercise are more alert(灵活). That means they do better in tests and schoolwork than those who don’t exercise.
They are many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you exercise in the following ways: You have to like what you are doing. Exercise enough--- but not too much. It’s best to exercise twice a week. Thirty minutes each time is enough. Try all kinds of sports until you find one, two or even three sports that feel right for you.
You can exercise at fitness centers. They have a lot of equipment(设备)there. The equipment will help exercise your arms, legs and other parts of your body to make you healthy. Some people buy equipment for their homes. But it’s very expensive.
小题1:the underline word “fitness centers” in the passage means _____.
A.商务中心B.健身中心
C.医疗中心D.购物中心
小题2:The sport “_____” is not told in the passage.
A.playing soccerB.skateboarding
C.walkingD.running
小题3:The doctors say that exercise can make your heart and body _____.
A.illB.happyC.strongD.health
小题4:About “exercise”, which statement of the following is NOT right?
A.Thirty minutes’ exercise each time is enough.
B.You have to exercise too much every day.
C.You needn’t do all kinds of sports to keep healthy.
D.You have to like the sports that you are doing.
小题5:It’s best to exercise _____.
A.at fitness centersB.in groups
C.in the morningD.twice a week
We’ve talked about snails (蜗牛) and their slow move. But much of the time snails don’t move at all. They’re in their shells ---sleeping .
Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into its shell and closes the opening with a thin cover. Then it goes to sleep. A snail will die in a heavy rain. So whenever it rains, it goes inside its shell house and goes to sleep. A snail can sleep for as long as it needs to. It can take a short sleep. Or it can sleep for days at a time. And it spends all the winter months in its shell, asleep.
In spring the snail wakes up. Its body, about three inches long, comes out of from the shell. When hungry, the snail looks for food. It can’t see very well. Its eyes, at the ends of the top feelers are very weak. But its sense of smell is very strong. It helps the snail to the new greens. Then the snail’s little mouth goes to work.
A snail’s mouth is no longer than the point of a pin(针). Yet it has 256,000 teeth! The teeth are so small that you can’t see them. But they do their work.. If you put a snail in a hard paper box, it will eat its way out. And if a snail wears out its teeth, it will grow new ones.
Mostly, a snail looks for food at night .But on cloudy days it eats in the daytime. It eats all day long. A snail can go on eating for hours and never feel full.
小题1:A snail__________.
A.moves more slowly in the daytimeB.has thousands of feet
C.doesn’t move at allD.sleeps much of the time
小题2:In the sentence “A snail draws its body into its shell” the word “draw” means_________.
A.to make with a penB.to keep away from
C.to pullD.to move to end
小题3:From the story we know_________.
A.the snail’s shell is very thin
B.a snail can’t see well
C.the snail’s nose is quite short
D.the snail’s body changes in different seasons
小题4:A snail goes to sleep when_________.
A.it feels hungry B.it is put in a paper box
C.spring is coming D.it rains heavily
小题5:Which of the following in not true?
A.A snail doesn’t like living under the sun.
B.In winter the snail doesn’t eat or move.
C.The snail’s teeth can’t be worn out..
D.The snail’s strong sense of smell helps to find things far away.
请仔细阅读题中的学生情况说明,从A—F中选出能解决他们问题的恰当建议。(有一项多余)
A.Emily often feels tired and seems to be lack of energy.
B.Jeff spent his summer vacation on the beach and got serious sunburnt.
C.Kate has poor eyesight and she can’t see clearly at night.
D.Tony sometimes feels pains in his bones and he has loose teeth.
E. Luke is so careless that he often gets hurt. And it takes a long time for his wound to heal.
F. Linda feel nervous before the new people.

1.Vitamin A
What can high-vitamin A foods do for you?
??be great for night vision
??help you see in color
??help your grow properly and aids in healthy skin
﹡ vitamin A in carrots helps you see at night

2.The B vitamins
What can the B vitamin do for you?
??help make energy and set it free
??help make red blood cells which carry oxygen(氧气) throughout your body
﹡ The B vitamins in leafy green vegetables help your body make protein(蛋白质)and energy.

3.Vitamin C
What can vitamin C do for you?
??keep body tissues(组织) in good shape
??help you heal when you get hurt
??help your body resist infection
﹡ Vitamin C in oranges helps your body heal if you get a cut

4. Vitamin D
What can vitamin D do for you?
??help keep your bones strong and healthy
??help keep your teeth strong and healthy
??help your body absorb the amount of calcium(钙)
﹡ Vitamin D in milk helps your bones and teeth.
 "
5. Vitamin E
What can vitamin E do for you?
??protect your skin from ultraviolet(紫外线) light
??protect you lungs from becoming damaged by polluted air
??help make red blood cells
﹡ Sunflowers seeds are the richest in Vitamin E
  Napoga  is a 12—year---old  girl in Ghana, Africa. It is hard for her family to get clean water . Every morning , she leaves home at half past five to get clean water for her family in a village far away . It takes her six hours to get enough clean water for daily cooking and drinking. She has no time to go to school or to play with her friends. Millions of people in the world are like Napoga . They can’t get enough clean water to keep healthy.
Earth Day is April 22. But on all other days, we must also remember it. The water we use is the most important natural resource(自然资源)on the earth.
Water covers 70 perent of the earth’s surface (表面). But most of that is sea water. We can’t use it for very many things.  Fresh water covers only one percent of the earth’s surface.
You probably feel lucky that your life isn’t as hard as Napoga’s . But that doesn’t mean you don’t have to worry about water. We all face serious water problems. One of them is water pollution. All kinds of things from cars, factories, farms and homes make our rivers , lakes , and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish , too. Now, thirty-four percent of all kinds of fish are dying out.
How do cars and factories make our water dirty? First, they pollute the air. Then , when it rains, the rain water comes down and makes our drinking water dirty. Dirty rain, called acid rain(酸雨), is also bad for plants ,animals and buildings.
Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to save more water for ourselves  and our children. Here is some advice for saving water:
● Turn off the water while you brush your teeth. You can save as much as 450liters(升)each month.
● Leaky taps (漏水的龙头)waste a lot of water. Fix them right away.
●You can easily cut your 10—minute showers in half---and you’ll be just as clean.
●When you wash dishes, don’t let the water run.
●Only wash clothes when you have a lot to wash. If your washing machine isn’t full , you are wasting water!
根据材料内容,选择最佳答案,并将其标号填入题前括号内。
小题1:Every morning Napoga went to get clean water _________.
A.before she went to school
B.after she finished school
C.without going to school
D.after she played with her friends
小题2:On the earth, _______________.
sea water is  more widely used than fresh water
B.there is very little water for our living
C.there is 71 percent of fresh water
D.we don’t need to worry about water
小题3:Acid rain____________________________.
A.is only bad for living things.
B.can be produced in factories
C.doesn’t do harm to people , but it’s bad for plants, animals and buildings.
D.doesn’t just do harm to human beings but to animals, plants and buildings.
小题4:Which of the following wastes water?
A.We need ten minutes if we want a clean shower.
B.We should put in enough clothes when we wash them in washing machines.
C.You can keep yourself clean by having a shower for five minutes.
D.Don’t let the water run when we brush our teeth and wash dishes.
小题5:What’s the main idea of the passage?____________.
A.Something must be done to prevent water from being polluted.
B.Clean water means much to human beings and living things around us.
C.It’s time to take care of the water we use.
D.Water is the most important natural resource on the earth.
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