Question: Read the article and select the best answer. Article: As the saying goes, man struggles upwards; water flows downwards. Water runs downhill from mountaintops to streams to rivers to oceans. But downhill isn't the only way that water moves .A new study measures how water travels from country to country for human consumption. This flow isn't the type we usually think about .These scientists looked at the water used to grow and make the products which get shipped from nation to nation as imports or exports. They call this a flow of "virtual water ". We typically think about water as the liquid that flows from a tap. However,92%of the water used by people goes into growing crops,according to water researcher Arjen Hoekstra. He recently studied the hidden travels of virtual water used in products made from things like crops and meats .These products are shipped around the world. For example, consider a sugary soft drink. Hoekstra estimated that to produce one half-liter of the drink requires between 170 and 310liters of the water--about 95%--is used to grow and process the ingredients .Another 4%goes into the packaging and labeling. In Hoekstra's calculation, when one country produces a half-liter of soda and sells it abroad,it exports as much virtual water as would fill a large refrigerator. According to Hoekstra's new report,dry countries like Israel and Kuwait,both in the Middle East,get the majority of their virtual water from other countries,through imported products. More surprisingly, some wetter countries,like the Netherlands and the United Kingdom, also get the majority of their virtual water from other places. That means that most of the water used to grow or produce the products and food consumed in those countries came from other countries. In the United States most of the virtual water used comes from American sources .In China even less of the water associated with its products. Question: The example of a sugary soft drink in Paragraph 3 is given to show _ . Options: A: how drinks are shipped B: how virtual water is exported C: how virtual water is used D: how drinks are made
Answer: C

Question: Read the article and select the best answer. Article: Man still has a lot to learn about the most powerful and complex part of his body -- the brain. It may be surprising to learn that it isn't age that makes you lose your memory. The reason could be that you have a "lazy" memory, not an old one. Like your body your memory improves with exercise. Once given plenty of exercise, the brain keeps its power. Before discussing how to improve the memory, let's look at how the brain works. There are two sides to the brain, the left and the right. The right side deals with the senses (what we see, hear, feel and smell). It's the creative and imaginative side. The left side is concerned with logic. It analyzes information and puts it in order. Some recent research suggests that we remember everything that happens to us. The problem most of us has is recalling events. Most forgetting takes place immediately after learning. An hour after learning something new, more than 50% has been forgotten. After a month, 80% has been forgotten, and so on. This shows revision is very important. If you revise new material you have learnt, you remember much more. So it's of vital importance to revise newly learned material often, and have frequent breaks. We best remember what we learn at the beginning of a learning period and at the point where we stop. After the break, revise what was learned before the break and then continue learning the new material. These breaks should happen every 20 or 45 minutes. Other experiments have shown the brain needs time to "digest" what has been learned. The time necessary for this is 5 to 10 minutes. After the break, the memory will have absorbed what it has just learned, and more will be remembered. During this period it is important to exercise the right side of the brain, because the left side is used during the learning period. Therefore you should relax. Listening to music, breathing in fresh air, and looking at a picture are all ways of using the other side of the brain. So when you are studying alone, make a plan which shows when to have breaks... Question: Where is this text most probably taken from? Options: A: Science fictions. B: Students' literature. C: An advertisement. D: A science report.
Answer: D

Question: Read the article and select the best answer. Article: WASHINGTON-Laura Straub is a very worried woman . Her job is to find families for French teenagers who expect to live with American families in the summer . It's not easy , even desperate . "We have many children left to place :40 out of 75," said Straub , who works for a Paris-based foreign - exchange programme called LEC. When exchange programmes started 50 years ago , family life was more accommodating . For one thing , more mothers stayed home . But now , increasing numbers of women work outside the home . Exchange-student programmes have struggled in recent years to sign up host families for the 30,000 teenagers who annually come from abroad to spend academic year in the prefix = st1 /United States, as well as the thousands more who participate in summer programmes . School systems in many parts of the US, unhappy about accepting non-taxpaying students , have also strictly limited the number of exchange students they accept . At the same time , the idea of hosting foreign students is becoming less _ . In searching for host families , who usually receive no pay , exchange programmes are increasingly broadening their appeals to include everyone from young couples to retirees . "We are open to many different types of families," said Vickie Weiner , eastern regional director for ASSE, a 25- year -old programme that sends about 30,000 teen-agers on academic -year exchange programmes worldwide . For elderly people , exchange students "keep us young -they really do ," said Jean Foster , who is hosting 16-year -old Nina Porst from Denmark. Question: Which of the following is the best title of this passage ? Options: A: US Struggle to Find Host Families B: Idea of Hosting Students Is Different C: Foreign-exchange Program Is Going On D: Exchange Students Keep Old People Young
Answer:
A