Read the following article and select the best answer. Article: A popular student in her small high school, Katie started college, expecting to do well in her courses and be best friends with her roommates. But things didn't turn out that way. Psych 101, the course she thought would be a first-semester favorite, turned out to be a struggle. Living away from home tends to be the toughest adjustment for first-year students. You may feel homesick in your first weeks or months. It can help to call, write, or email your parents and friends, making them know how you're going. You can also talk with your roommates. As first-year students themselves, they're probably experiencing many of the same fears and worries that you're dealing with . But what if you don't get along well with your roommates? In some cases, it can be a good thing if you and your roommates aren't much alike. Different views on things may be helpful, so respect your differences no matter what. If you and your roommates don't get along well, it can help to find someone who you feel does understand you, which should be easy on a campus with so many people. Many schools have student organization nights where all of the campus clubs gather and promote their organizations, so you can meet people with the same interests there as you. You'll also meet tons of people in class or in your dorm building. As homesickness, painful throats, sprained ankles and wisdom teeth that act up are common among college students, you should check out your student guidebook or your school's website to find out information about the university health center. If you think you cannot deal with your problems, make a stop at the school counseling center. First-year troubles are something the counselors know well. You can get help there. Question: What's the main idea of the text? - Freshmen may meet many problems. - Communication is important in college. - How you can adjust to your first year in college. - How schools help freshmen to get used to college life.
How you can adjust to your first year in college.

Read the following article and select the best answer. Article: With only about 1, 000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species . That's a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called "Noah's Ark". Noah's Ark is aimed at collecting eggs, embryos , semen and DNA of endangered animals and storing them in liquid nitrogen . If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M's College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future. It is estimated that as many as 2,000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years. This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal. The entire procedure could take from three to five years to complete. "The nuclear transfer of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it's difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort," adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog. "They are trying to do something that's never been done, and this is very similar to our work in Noah's Ark. We're both trying to save animals that face extinction. I certainly appreciate their effort and there's a lot we can learn from what they are attempting to do. It's a research that is very much needed. " Question: According to Professor Kraemer, the major problem in cloning pandas would be the lack of _ . - available panda eggs - host animals - qualified researchers - enough money
available panda eggs

*Question*
Read the following article and select the best answer. Article: What will power your house in the future?Nuclear,wind,or solar power?According to scientists at the Massachusetts Institute of Technology (MIT) in the US,it might be leaves -- but artificial ones. Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis .Now researchers have found a way to imitate this seemingly simple process. The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts .Similar to natural leaves,it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell,which uses those two materials to produce electricity,located either on top of a house or beside the house. Though the leaf is only about the shape of a poker card,scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. "One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology," said Nocera at a conference of the American Chemical Society. The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf,by contrast,is made of cheap materials,easy to use and highly stable. In laboratory studies,Nocera showed that an artificial leaf prototype could operate continuously for at least 45 hours without a drop in activity. The wonderful improvements come from Nocera's recent discovery of several powerful,new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now,the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides,the device can run in whatever water is available;that is,it doesn't need pure water. This is important for some countries that don't have access to pure water. With the goal to "make each home its own power... Question: The purpose of the scientists at MIT in developing the new artificial leaf is to _ . - build up more power stations in the world - provide cheaper energy for developing countries - offer people in developing countries access to pure water - gain a deeper understanding of the photosynthesis process
**Answer**
provide cheaper energy for developing countries