Blood is important to support our lives. But for now, the only way we can get more of it is through donation. And donated blood has its own problems. First of all, certain blood types are extremely rare. Type O negative blood (O-), for example, only (exist) in 7 percent of people, according to Sunday Times. There are fewer
(donate) and therefore there isn’t enough of this type of blood for everybody who needs it. In addition, donated blood comes from various people, which means that it has to
(examine) carefully for diseases such as HIV to make sure that it’s safe for transfusion(输血).
This is__ scientists all over the world have been trying to make blood in labs. And now, someone finally succeeded—Marc Turner at the Scottish National Blood Transfusion Service has produced blood fit for transfusion, reported Forbes. Different from many ____
scientists, who have tried to make blood by mixing up different ingredients together, Turner chose to grow blood
(direct) from human stem cells. He developed
special technique to create a chemical environment similar to that in our bone marrow (骨髓). This environment encourages stem cells to develop fully
red blood cell.
According to Turner, his artificial blood is (likely) to contain disease viruses or produce side effects. And the best part is that
he managed to produce was type O- blood. Not only is it a rare blood type, it’s also a universal type, which means it can be transfused into any patient.
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Why is pink or purple a color for girls and blue or brown for boys?
The answer depends largely cultural values as well as personal experiences. To the Egyptians, green was a color
represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. During the Spring Festival in China, children
(give) money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect
against evils（灾祸）.
People’s (choose) of colors is also influenced by their bodies’ reactions toward them. Green is said to be
most restful color. It has the ability to reduce pain and relax people both mentally
physically. People
(work) in green environment have been found to have fewer stomach aches.
Red can cause a person’s blood pressure to rise and increase people’s appetites（食欲）. Many decorators will include different shades of red in the restaurant. And many commercial websites will have a red “Buy Now” button because red is a color that (easy) catches a person’s eye.
Blue is another calming color. Unlike red, blue is believed to cause people to lose appetite. So you want to eat less, some suggest that eating from blue plates can help.
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How time flies! I will be a senior high school student this term. I am very excited and nervous. I feel excited because I (learn) more knowledge from my new teachers.
(especial), I can learn more about English, math, physics, chemistry and biology. I think they are
(interest). I can meet many new
(friend) in senior high school as well. I think they,
new friends, will be friendly and kind-hearted. I believe I will get along well
all of my new classmates.
the saying goes, “A friend is
(easy) to be lost than found.” If you want to make friends with others, you should treat them true-heartedly. It is really hard,
I will try.
I feel nervous because I heard that it is difficult (study) in senior high school. I think I will meet many problems and fall through many times. But it’s nothing serious, because I know if I work hard, I will be successful at last. I want to tell myself: Try！Try! And never say die！
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Franklin’s life is full of charming (story) which all young men should know—how he sold books in Boston, and became the guest of kings in Europe; how he was made Major General Franklin, only
(quit) because, as he said, he was no soldier.
This poor Boston boy, a day’s schooling, became master of six languages and never stopped studying; this hard-working boy conquered the lightning, made his name famous, received degrees and diplomas (学位证书) from many colleges,
became forever
(remember) as “Doctor Franklin”, philosopher, scientist and political leader. Self-made, self-taught, the candle maker’s son gave light to all the world;
street bookseller set all men singing of liberty.
He built America, for what the nation is today is (large) due to the management, the forethought, the
(wise), and the ability of Benjamin Franklin. He belongs to the world, but especially he belongs to America. The people around the world
(honor) him while he was living; he is still regarded
the loftiest man by the common people today after his death. And he will live in people's hearts forever.
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On a Friday night, a poor young artist stood at the gate of the subway station, playing his violin. The music was so great many people slowed down their paces and put some money into the hat of the young man. The next day, the young artist went there again. Different
the day before, he took out a large piece of paper and laid it on the ground and put some stones on it. Then he adjusted the violin and began playing. Before long, he
(surround) by many people, who were all attracted by the words on that paper. It said, “Last night, a gentleman
(name) George Sang put an important thing into my hat by mistake. Please come to claim
.”After about half
hour, a middle-aged man ran there in a hurry and asked if he had seen a lottery. After the young violinist made sure it was Mr. George Sang, he returned the lottery
a prize of $500,000 to him. Later someone asked the violinist: “Why didn’t you take the lottery ticket for yourself?”The violinist said, “
I don’t have much money, I live happily; but if I lose
(honest), I won’t be happy forever.” Through our lives, we can gain a lot and lose a lot. But
(be) honest should always be with us.
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London is the capital city of the United Kingdom which is _ the northwest coast of the continental Europe. London is the seat of the Government of the United Kingdom. Many government departments are based close to the Palace of Westminster.
The history of London goes back to its founding by the Romans, named it Londinium .London has a wide range of peoples and cultures, and more than 300 languages
(speak) within Greater London. London is
_ leading global city with strengths in arts, education, entertainment, fashion, tourism and transport. It is one of the world's most-visited
(city) in terms of international arrivals and has the world's largest city airport system. London has 43 universities, making it the largest centre of higher education in Europe. In 2012, London became the first city
(host) the modern Summer Olympic Games three times. London is a world
(culture) capital and is home to many museums, galleries, libraries, and sporting events,
(include) the British Museum which always symbolizes London. The London Underground is the
(old) underground railway network in the world.
London is such a wonderful city travelling there will be an exciting experience.