About a year ago, if you had asked who Dinara Safina was the answer would have been:   "She is Marat. Safin's younger sister."  Back then she was overshadowed by her wonder brother.  But now she has made a name for herself: the world No. 1 player in women's tennis. The 22-year-old Russian. will overtake Serena Williams of the prefix = st1 /USfor top ranking on April 20.  "Before, every place I go, I am Marat's sister. Nothing else," she told New York Times. "I always wanted to be myself, and now finally the results are coming, and people can know me as Dinara Satina." Safina has made it to two great event finals, in the 2008 French and in this year's Australian Open, and won a silver medal in the Beijing Olympic Games. Clearly; family isn't the only connection Safina's and her brother share. Both of their DNA burns with competitive fire. Satin has held the distinction for years of being a hot tempered player on Court. When he lost his temper, he would break a racket . Safina is as emotionally explosive as her brother. A headline in the newspaper The Australian once described her as   "mad as a snake".  The Sydney Morning Herald, during the Australian Open, summed up Safina's volatile emotional state with the headline: "Satina goes from basket case to top of the world." It's not rare for a family to have two top tennis players. Safina's father owns a tennis academy and her mother worked as a coach.   "I had no choice but to become a tennis player, but I don't mind being a tennis player," Safina said. From this talented family she is also given one of her best weapons on court, her size. She is 1.82 meters tall and Weighs 70 kg. But it is hard work that led her to her recent Success. "I hope to prove to everyone over the coming months that I deserve the honor of being world No. 1," she said. What is the passage mainly about? A) How Safina came first in world women's tennis. B) How the parents taught Safina to play tennis. C) How her brother helped Safina play tennis. D) How Safina beat her brother in playing tennis.
A


(Question)
Can people change their skin color1 without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin color1.     The gene comes in two versions, one of which is found in 99 percent of Europeans. The other is found in 93 to 100 percent of Africans, researchers at Pennsylvania State University report in the latest issue of science.     Scientists have changed the color1 of a dark-striped zebrafish to uniform gold by inserting a version of the pigment gene into a young fish. As with humans, zebrafish skin color1 is determined by pigment cells, which contain melanin  . The number, size and darkness of melanin per pigment cell determine skin color1.     It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation   in the gene for melanin production. This results in less pigmented skin. However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes.     Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun , which can cause skin cancer. But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.     "Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin color1," said Cheng.     The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin color1 without damaging it like chemical treatment did on Michael Jackson. ks5u Scientists have done an experiment on a dark-striped zebrafish in order to   _  . A) find the different genes of humans' B) prove the humans' skin color1 is similar to that of zebrafish in its formation C) find out the reason why the Africans' skin color1 is dark D) find out the ways of changing people's skin color1
(Answer)
B


By the age of almost four,  Elijah Edney has never had a haircut in his life.  But now he can ' t wait to visit the barber's  -  for two reasons: losing his two - foot - long golden hair will mean   that strangers stop mistaking him for a girl; the hair will be donated to charity to provide a wig     for a child with cancer. Mrs.  Edney, who works in a restaurant, says, "Elijah has always had beautiful hair, so I let him grow it as he w8nted.  It' s like silk.  But now it is at a stage where people mistake him for a  girl and he wants it cut into a boy's haircut. " Mrs.  Edney and her husband want to collect enough money-PS350-to process Elijah's hair  for a sick child.  She says,  "I couldn't bear to see all Elijah's beautiful hair go to waste and my  mum mentioned charities that have human hair made into wigs. " Mrs. Edney says, "If we can raise the amount we want, it will mean a family will not have   to pay for the wig and can receive it for free.  When you've got children yourself, you hope that if  they lost their hair someone would do the same for them by donating their hair. " The two-foot-long hair will be donated to the Little Princess Trust    to  make a wig for children suffering cancer. Elijah keeps telling people he is giving his hair to poor  princesses and he is so excited about it. A spokesman for the Little Princess Trust says, "We're very grateful to anyone who decides   to have their hair cut to donate it to the Little Princess Trust. As a result of hair donations like  this, the charity receives real-hair wigs for free to pass on to families whose children have sadly  lost their own hair through cancer treatment. " Why has Mrs.  Edney let Elijah's hair grow so long? A) Because Elijah has beautiful hair. B) Because she likes long hair. C) Because Elijah looks nice with long hair. D) Because she wants to donate his hair to charity.

A