Vitamins(维生素)are a discovery of this century．A hundred years 　　1　　, no one knew anything 　　2　　 them．The vitamins are 　　3　　 by letters of alphabet．Vitamin A 　　4　　 by the eyes．There is Vitamin A in milk, butter and green vegetables．It 　　5　　 by the body．

　　Vitamin B must be supplied(提供)　　6　　 by some of our food．The skins 　　7　　 grains of all sorts have Vitamin B in them．

　　Vitamin C is very important 　　8　　 the body．Without it 　　9　　 teeth will become loose and their arms and legs become weak．Oranges and tomatoes 　　10　　 Vitamin C in them．

　　There are other vitamins．But these A, B, C are the most important．

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　　Market is a place we get food from．My　　1　　 goes there every day．

　　Two or three 　　2　　 ago, I went with her to a 　　3　　 near our home．When we went inside, I saw the ground was 　　4　　 and a lot of people were doing 　　5　　 there．It was very noisy because so many people were speaking 　　6　　．The sellers and the people were very 　　7　　．There were many vegetables, fishes, and a lot of meat there．My mother 　　8　　 to buy some of them, but there were too many people．We had to wait for some time 　　9　　 we bought all the food we needed．Now everything in the market is much 　　10　　 than before．

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　　We live in the “computer age”．Just 41 years 　　1　　, computers couldn't do much．They were very big and expensive．They used a lot of energy(能量)．Only 　　2　　 people were interested 　　3　　 them．Today computers are smaller and cheaper．They can do 　　4　　 difficult work．

　　Computers become important 　　5　　 many reasons(原因)．They work faster than man and make few mistakes．They can “remember” much information．A computer can do millions of problems 　　6　　 a few seconds．A person might 　　7　　 years to work out so many problems．

　　People now use computers in nearly every kind of work．Computers are very useful and the use of computers 　　8　　 growing．More computers mean more jobs for people, because people 　　9　　 to run and mend them．Would you like to learn 　　10　　 to run a computer?

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完形填空练习：

　　Mother's Day is a 　　1　　 for mothers．It is celebrated in the United States, England, India and 　　2　　 countries．In a short time, it becomes widely celebrated．Mother's Day 　　3　　 on the second Sunday in May．On that day, many people 　　4　　 gifts of love to their mothers．

　　In China, people do the same on the day for mothers．And, in some cities, people sometimes ask 　　5　　 to be broadcast(广播)on the radio for his or her mother only．　　6　　 might cost a little money, 　　7　　, as it is said,“　　8　　 is invaluable(无价的)．”

　　On May 8,1999,just the day before the Mother's Day that year, a Chinese 　　9　　 was killed in a criminal bombing(罪恶轰炸)in Yugoslavia(南斯拉夫)．Her name is Shao Yunhuan, a 　　10　　, who wrote lots of articles(文章)for Chinese newspapers．All the Chinese will remember her for ever．

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完形填空

　　When I was six, I went to a public school．In the 　　1　　 I was behind the other kids because of my speech and reading problems．All the kids would 　　2　　, “You are a fool, you are a fool,”and so on．I thought they were 　　3　　 because all my grades showed it．I had no self-confidence．

　　Through the first five years of the public school, I was small and clumsy(笨拙的)．In sixth grade, I became interested in 　　4　　．The class had its own sports day every year．Each class would have its own teams play against each other．I went out for all of the 　　5　　．I was not the best but I was not bad．The only thing that I could do was to run and run fast．This 　　6　　 the other kids because I was so clumsy, and then 　　7　　 a lot of more name-calling(外号)from the kids．I did not know why they were doing this, and it really 　　8　　 me．

　　Between seventh and eighth grade, I started to 　　9　　．In three months, I grew seven inches．At the start of eighth grade, I began to play football．I was much bigger than everybody else; I was 　　10　　 than most of the backs(后卫)we played against．The other team would not run the ball towards me, so I just 　　11　　 them down．It was the first time in my life that I was really good at something and knew it．It was a new feeling of 　　12　　．

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完型填空

Who invented tea?

Did you know that tea, the most popular 　　1　　 in the world, was invented by 　　2　　?Although tea wasn’t brought to the 　　3　　 world until 1610, this beverage was discovered over three thousand years before that．According 　　4　　 an ancient 　　5　　 legend, the emperor Shen Nung discovered tea when he was boiling drinking water over an open fire．Some leaves from a nearby bush fell into the water and remained there for some time．The emperor 　　6　　 that the leaves in the water produced a pleasant 　　7　　．Later he decided to 　　8　　 the hot mixture．It was quite 　　9　　．And in this way, one of the world’s favorite 　　10　　 was invented．

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完型填空：

Last week 　　1　　 was trying to cheer up Jimmy the Bike Boy．But 　　2　　 week, Jimmy is happy again．　　3　　 Monday he told a radio interviewer that he had run out of 　　4　　 to buy old bikes．He also put up some 　　5　　 asking for old bikes and called up all his friends and told them about the problem．He even handed 　　6　　 advertisements at a local supermarket．Then he told the teachers at 　　7　　 about his problem and they set up a call-in center for parents．The strategies 　　8　　 he came up with worked out fine．He now 　　9　　 sixteen bikes to fix up and give away to 　　10　　 who don’t have bikes．

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　　Dick works in a factory．It is far 　　1　　 his home．Every day he 　　2　　 to work in the morning and back home in the evening．One day, he came home late and didn’t look 　　3　　．His wife saw his 　　4　　, and asked him, “Why aren’t you happy?Are you not 　　5　　, dear?”

　　“Yes, I’m quite well．But I’m very angry 　　6　　 the bus ticket was three pence last week．But today it is two only．”

　　“That’s 　　7　　,” his wife said, “The bus ticket is cheaper now．You 　　8　　 save two pence every day．” But Dick said, “No, you’re a fool．I walk to work and back home every day．　　9　　 I saved six pence every day, but now I have two pence 　　10　　．

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完型填空：

　　Have you ever planted a few trees on Tree Planting day?Each year, millions of people, both 　　1　　, plant a lot of trees．But this may not be the best way to make your home a 　　2　　 place．

　　Last week we visited a park in Hebei．We were 　　3　　 to find most of the trees had been burned．The workers told us that the trees 　　4　　 soon after they were planted because they weren’t watered well enough．　　5　　 workers burned them and cleaned the place for 　　6　　 trees to be planted this year．　　7　　 a card found in one of the dead trees, a student wrote,“I hope this tree will grow up with me to 　　8　　 the backbone of our country．” The workers said that the survival of the trees was really more important than 　　9　　were planted．

　　Some people in Beijing now have a new idea that they can donate some money and let professional plant and 　　10　　 the trees．

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完形填空：

Restaurant Science

Restaurant owners have to know how to make food．They 　　1　　 have to know how to make money．Here are some things they’ve learned from 　　2　　 studies．The color red 　　3　　 people hungry．Red also makes customers 　　4　　 faster．Many fast food restaurants, 　　5　　, have red furniture or walls．Soft colors like pink and light blue make people 　　6　　, so they spend more time 　　7　　 their meals．Soft lighting makes people look good, but it makes food look bad．Loud music may be nice 　　8　　, but it soon makes people want to leave．Hard seats also make customers want to eat quickly and leave．Many restaurants, especially fast food restaurants, use this knowledge to make customers eat faster．Customers only sit for about 20 minutes 　　9　　 they leave．Because customers don’t stay very long, small restaurants can 　　10　　 many people every day．

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