We know, painkillers in a tablet can make your headache go away, and antibiotic from a tube can prevent your cuts from becoming infected. Can medicine come in chicken eggs? A team of scientists from Scotland says "yes." They've kept some special chickens that lay eggs with disease-treating drugs inside. These drugs are made of molecules called proteins. Animals make thousands of proteins--they're the main ingredients in skin, hair, milk, and meat. Since animals can make proteins easily, they're good animals for making protein drugs. Researchers have already made cows, sheep, and goats that pump out protein drugs in their milk. But chickens are cheaper to take care of, need less room, and grow faster than these other animals. "Those qualities could make chickens a better choice to become living drug factories." says Simon Lillico of the Roslin Institute near Edinburgh, Scotland. Lillico and a team of researchers changed chickens' DNA--the code that tells cells how to make proteins--so that the birds' cells made two protein drugs. One drug can treat skin cancer, and the other treats a nerve disease called multiple sclerosis. The scientists changed the chickens' DNA so that the birds made these drugs only in their egg whites. This protects the chickens' bodies from the drugs' possible harmful effects and makes it easy for scientists to collect the drugs. These special chickens can pass on their drug-laying abilities to their chicks. So far, the Scottish researchers have kept five generations of drug-producing chickens. But the scientists need to improve these chickens. The chickens don't make enough drugs to treat people yet. Once the researchers perfect their technique, you might eventually take your medicine from chicken eggs. Why did the chickens make the drugs only in the egg whites? A) Because it will help to collect the drugs easily. B) Because it will not change the DNA of the chickens. C) Because it will be easy for the patients to take the drugs. D) Because it will prevent possible harmful effects on the patients.
A
This story took place a long time ago. But it has been repeated time and time again. Everyone is moved by the true story. An old man was knocked down by a car and was taken to hospital. He was badly hurt, and during his few returns to consciousness, he repeatedly called for his son. None knew where his son was. A dirty letter was found in his pockets. The nurse learned that his son was a solider inprefix = st1 /North Carolina. The hospital called the Red Cross offices to find the young man. The young solider was rushed to the airport in time to catch the plane. It was evening when the young solider walked into the hospital. A nurse took him into the bedsides of the old man. "Your son is here," she said to the man. She had to repeat the words several times before the old man's eyes opened. He dimly saw the young man and got great comfort. He reached out his hand. The young solider held the old man's hand and offered words of hope. All through the night the young solider sat besides the bed. The nurse offered to watch instead of him for a while. He refused. At dawn the old man died. The nurse started to comfort him but the solider asked her, "Who was that old man?" "He was your father," she answered. "No, he wasn't. I never saw him before." "I knew right away there was a mistake, but I also knew he needed his son, and his son just wasn't here. I realized I was needed. So I stayed." How did people get to know something about his son? A) They guessed from the old man's anxious expression on the face. B) They found him from the address on the letter. C) They found someone who knew the father and son. D) They asked for the help from the Red Cross.
B
*Question*
There are a lot of things that happen to me in China but would certainly never happen in the US. One of those things is being called "strong". The first time was last December. I was walking across the high school campus in Guangzhou where I taught when a student in a gray scarf waved hello. I smiled and waved back, but then she stopped and called my name. "You're so strong!" She smiled and pointed at what appeared to be my arm. I looked down at my arms. Let's get one thing clear: I'm a very skinny guy. Once, while rehearsing for a high school talent show, I was told by the teacher in charge that I couldn't participate in the men's shirtless dance routine because my visible rig cage would frighten the audience. "I'm so what?" "You're so strong!" _ repeated. "Um, thanks!" I didn't know what else to say, so we both waved goodbye. The next morning I stepped into my oral English classroom only to be greeted instantly by a unanimous "Waaa!" of shock and admiration. "What?" I asked. "You're so strong!" shouted a boy from the back of the class. "Okay, will someone tell me what that means?" I was curious as to the real reason for such praise. So I turned to the monitor, gesturing for him to speak. "We just mean, you look very strong today," he offered earnestly. "What?! You mean like this?" I curled my arm like a bodybuilder. "No! But it's so cold, and you're only wearing a shortsleeve shirt." Oh, I got it. My "strength" had less to do with my muscle and more to do with my apparent ignorance of the cold weather. The author used the example of being refused to join in the dance routine to show that _ . A) many people worry about his bad health B) he is as strong as a body builder C) actually he isn't physically strong at all D) being called "strong" often happens to him
**Answer**
C