input question: Write a multi-choice question for the following article: Article: Winter begins in the north on December 22nd. People and animals have been doing what they always do to prepare for the colder months. Squirrels , for example, have been busy gathering nuts from trees. Well, scientists have been busy gathering information about what the squirrels do with the food they collect. They examined differences between red squirrels and gray squirrels in the American state of Indiana. The scientists wanted to know how these differences could affect the growth of black walnut trees. The black walnut is the nut of choice for both kinds of squirrels. The black walnut tree is also a central part of some hardwood forests. Rob Swihart of Purdue University did the study with Jake Goheen, a former Purdue student now at the University of New Mexico. The two researchers estimate that several times as many walnuts grow when gathered by gray squirrels as compared to red squirrels. Gray squirrels and red squirrels do not store nuts and seeds in the same way. Gray squirrels bury nuts one at a time in a number of places. But they seldom remember where they buried every nut. So some nuts remain in the ground. Conditions are right for them to develop and grow the following spring. Red squirrels, however, store large groups of nuts above ground. Professor Swihart calls " _ ". Gray squirrels are native to Indiana. But Professor Swihart says their numbers began to decrease as more forests were cut for agriculture. Red squirrels began to spread through the state during the past century. The researchers say red squirrels are native to forests that stay green all year, unlike walnut trees. They say the cleaning of forest land for agriculture has helped red squirrels invade Indiana. Jake Goheen calls them a sign of an environmental problem more than a cause.???
output answer: Question: The study done by Rob Swihart and Jake Goheen is to _ .Options:A find out the living conditions for squirrelsB learn squirrels' influence on black walnut treesC do something to get rid of squirrelsD save the forests in the American state of IndianaAnswer:B

input question: Write a multi-choice question for the following article: Article: Linda was kind of late. Linda, 25, had a lot to do at work, plus visitors on the way: her parents were coming in for Thanksgiving from her hometown. But as she hurried down the subway stairs, she started to feel uncomfortably warm. By the time she got to the platform, Linda felt weak and tired -- maybe it hadn't been a good idea to give blood the night before, she thought. She rested herself against a post close to the tracks. Several yards away, Frank, 43, and his girlfriend, Jennifer, found a spot close to where the front of the train would stop. They were deep in discussion about a house they were thinking of buying. But when he heard the scream, followed by someone yelling, "Oh, my God, she fell in!"Frank didn't hesitate. He jumped down to the tracks and ran some 40 feet toward the body lying on the rails. "No ! Not you ! "his girlfriend screamed after him. She was right to be alarmed. By the time Frank reached Linda, he could feel the tracks shaking and see the light coming. The train was about 20 seconds from the station. It was hard to lift her. She was just out. But he managed to raise her the four feet to the platform so that bystanders could hold her by the arms and drag her away from the edge. That was where Linda briefly regained consciousness, felt herself being pulled along the ground, and saw someone else holding her purse. Linda thought she'd been robbed. A woman held her hand and a man gave his shirt to help stop the blood pouring from her head. And she tried to talk but she couldn't, and that was when she realized how much pain she was in. Police and fire officials soon arrived, and Frank told the story to an officer. Jennifer said her boyfriend was calm on their 40minute train ride downtown--just as he had been seconds after the rescue, which made her think about her reaction at the time. "I saw the train coming and I was thinking he was going to die, " she explained.???
output answer: Question: The passage is intended to _ .Options:A warn us of the danger in the subwayB show us how to save people in the subwayC report a traffic accidentD tell us about a subway rescueAnswer:D

input question: Write a multi-choice question for the following article: Article: American researchers have developed a technique that may become an important tool in fighting AIDS virus from attacking its target-cells in the body's defense system.When AIDS virus enters the blood,it searches for blood cells called T4 lymphocytes .The virus connects to the outside of T4 lymphocytes.Then it forces its way inside.There it directs the cells' genetic material to produce copies of the AIDS virus.This is how AIDS spreads. Researchers think they may be able to stop AIDS from connecting to T4 ceils.When AIDS virus finds a T4 cell,it actually connects to a part of the cell called CD4 protein. Researchers want to fool the virus by putting copies or clones of the CD4 protein into the blood.This way the AIDS virus will connect to cloned protein instead of the real ones.Scientists use genetic engineering methods to make the clones.Normally a CD4 protein remains on the T4 cell at all times;the AIDS virus must go to it. In a new technique,however,the cloned CD4 protein is not connected to a cell.It floats freely,so a lot more can be put into the blood to keep the AIDS virus away from real CD4 protein on T4 cells.One report says the.AIDS virus connects to cloned protein just as effectively as it connects to real protein.That report was based on tests with blood cells grown in labs.The technique is just now beginning to be tested in animals.If successful,it may be tested in humans within a year.???
output answer: Question: The best title for this passage is _ .Options:A AIDS-a deadly diseaseB A new technique in fighting AIDSC The spread of AIDS virusD The cloned CD4 proteinAnswer:B

input question: Write a multi-choice question for the following article: Article: Why do our eyes open wide when we feel fear? And why do our eyes become narrow when we express disgust ? According to a new research, it has something to do with survival. In a recently published paper, researchers concluded that expressions of fear and disgust changed the way human eyes gather and focus light. They argued that these changes were the result of evolutionary development and were intended to help humans survive, or at least discover, very different dangers. In order to test their hypothesis ,researchers examined two dozen volunteer college students with standard eye-exam equipment, and asked them to show expressions of fear and dislike. It was found that when the students widened their eyes, more light was admitted and their field of vision was expanded. When they wrinkled their noses in disgust, their eyes narrowed. This had the effect of blocking out more light but focusing on a specific point. Although some scientists have admitted that emotional expressions are intended primarily to communicate information, expressions of fear and disgust seem to perform different visual functions. "Eye widening may help to find a potential danger that requires much attention. And this would agree with the hypothesized function of fear," said researchers. "On the other hand, eye narrowing may help to distinguish and avoid different kinds of dangers, such as disease carriers and dirty foods. And this would agree with the hypothesized function of disgust." These findings supported naturalist Charles Darwin's view that expressions are not necessarily for communication and are not arbitrary ."If our expressions were arbitrary, they would show little cross-cultural relationship." researchers said. "But actually, our expressions probably have some universal functional principles."???
output answer:
Question: What is the hypothesis of the research in this text?Options:A Changes of human eyes lead to different emotional expressions.B Evolutionary development helps humans survive different dangers.C Emotional expressions affect how human eyes collect or focus light.D Evolutionary development causes people to express different feelings.Answer:C