Ques: Geena David knew she wanted to be a movie star when she was very young. She was not sure what gave her the idea, but she wanted to look like a movie star. "I have a lot of pictures from my childhood of me wearing sunglasses," she says. "I used to wear them to watch TV." Early movie actors started wearing sunglasses not because they looked good, but because their eyes hurt. The lights used on movie sets were extremely bright and could cause a painful problem known as "Klieg eyes". It was named after the Klieg brothers who invented the lights. Actors wore sunglasses to give their eyes a rest. But when movie stars began wearing their sunglasses in public, they quickly became a must. Eventually actors started wearing sunglasses in their movies as well as on the street. Audrey Hephburn wore ultra-cool Ray-Ban sunglasses in the 1961 movie, Breakfast at Tiffany's. As a result, Ray-Ban sunglasses started to appear more and more in the movies. In 1979, Ray-Ban "Wayfarers" were worn by Jake and Elwood in The Blue Brothers. Tom Cruise wore Ray-Ban "Aviator" sunglasses in the 1986 hit, Top Gun. Then in 1997, Will Smith and Tommy Lee Jones made Ray-Ban "Predator" sunglasses famous in Men in Black. Of course sunglasses aren't just a fashion statement. The main reason to wear sunglasses is to protect our eyes against UV radiation. UV radiation can damage our eyes, so people now choose their sunglasses carefully. But you don't have to give up style for safety. The choice of frames and lenses available these days is huge. So you can protect your eyes and still be the coolest person on the beach. Now people wear sunglasses   _  . A) for fashion and to protect their eyes B) just to protect their eyes C) because of bright lights D) because movie stars wear them
Ans: A

Ques: Donald was shaken by thunder on the bed before he could count "one thousand one". Then he heard the smoke alarm go off. He went downstairs quickly to investigate. When he opened the door to the basement  , flames exploded out. Donald fled   back upstairs to call 911 but the phone didn't work. When he tried to go downstairs, he was stopped by a wall of flames. He had to use a towel to cover his mouth. His house was three miles off the main road and so well hidden by trees that Donald knew calling for help would be useless. Actually, he didn't even try to do that. About one mile away lived Donald's closest neighbor, Jeremie. When he heard some sounds, Jeremie jumped out of bed, holding a phone and a flashlight, and went towards the noise. He dialed 911 the instant he saw the flames. When he came close to the house, Jeremie knew he'd better wait until rescuers came. But he didn't want Donald to die in the fire. Without hesitation  , he rushed into the house. He shouted, "Donald, where are you?" Then he had to run outside to catch his breath. After one more attempt  , he gave up and circled around back. He saw Donald on the second-floor balcony, but there was no way to get to him. Suddenly, he noticed a ladder. He dragged it over to the balcony and pulled Donald down just when the second floor fell down. Within the year, Donald built a new two-story wood house at the site of the fire. Jeremie and Donald don't run into each other regularly, but Donald knows that if he ever needs help, Jeremie will be there. From the text, we can infer that  _  . A) it was the firemen who saved Donald that night B) Jeremie helped Donald build a new wood house C) Donald had fallen off the second floor before Jeremie found him D) whatever difficulties Donald meets, Jeremie will help him
Ans: D

Ques: We live in a sweet world. An average American kid consumes  more than 20 teaspoons of sugar per day, and adults eat 50% more sugar today than they did in the 1970s. We all know that too much sugar isn't good for us. Researchers at the University of Utah used mice to make a study to prove the _ effects of eating more sugar. They found it could influence people's health seriously. During the 58-week-long study, mice were fed a diet containing 25% more sugar. This percentage is equal to a healthy human diet along with three cans of soda daily. The team found that these mice were twice as likely to die as mice without eating so much sugar. Though the mice did not show signs of obesity or high blood pressure, male mice produced 25% fewer offspring  than the other mice. The reason why mice were chosen for research by scientists is not far to seek. "Mice have the genetic  structure similar to humans'. Most substances  that are harmful to mice are also harmful to people; it's likely that those important physical problems that cause the rising death rate among mice can also influence people," says the study author James Ruff of the University of Utah. Findings from this study reveal negative effects that are not as detectable as weight gain or heart problems. Sugar can contribute to long-term changes in the body that can affect development and even shorten lives. Different types of sugar have different effects on the human body. Some of the sugar we consume comes from foods we might expect--candy, soda, and cookies. But much of the sugar that we eat is hidden. Food companies add large amounts of sugar to items we may not classify as sweets. To help cut down extra sugar consumption, nutrition experts suggest looking at the ingredients on food packages. Cutting sugar out of the American diet altogether may be difficult, but making every effort to control our nation's desire for sugar will avoid a sweeter future. Why did the scientists choose mice to do the study? A) Because a substance may have the same effects on mice and humans. B) Because mice have a longer lifespan   than other animals. C) Because mice can take in the harmful substances easily and quickly. D) Because mice are sensitive to the sweet taste.
Ans: A

Ques: It happened one morning 20 years ago. A British scientist Alec Jeffrey came across DNA fingerprinting: He identified the patterns of genetic material that are unique to almost every individual. His discovery changed everything from the way we do criminal investigations to the way we decide family law. But the professor of genetics at the University of Leicester, UK, is still surprised, and a bit worried, by the power of the technology he released upon the world. The patterns within DNA are unique to each individual, except identical twins, who share the same pattern. The ability to identify these patterns has been used to convict(...) murderers and to clear people who are wrongly accused. It is also used to identify the victims of war and settle disputes over who is the father of a child. Jeffrey said he and his colleagues made the discovery by accident while tracking genetic variations . But, within six months of the discovery, genetic fingerprinting had been used in an immigration case, to prove that an African boy really was his parents' son.*In 1986, it was used for the first time in a British criminal case: It cleared one suspect after being accused of two murders and helped convict another man. DNA testing is now very common. In Britain, a national criminal database established in 1995 now contains 2.5 million DNA samples. The U.S. and Canada are developing similar systems. But there are fears about the stored DNA samples and how they could be used to harm a person's privacy. That includes a person's medical history, racial origin or psychological profile. "There is the long-term risk that people can get into these samples and start getting additional information about a person's paternity  or risk of disease," Jeffrey said. DNA testing is not an unfailing proof of identity. Still, it is considered a reasonably reliable system for determining the things it is used for. Jeffrey estimates the probability of two individuals' DNA profiles matching in the most commonly used tests at one in a billion. According to the text, DNA testing can NOT be used in   _   . A) doing criminal investigations B) deciding faraily law C) clearmg wrongly accused people D) telling twins apart
Ans:
D