单选题Man: Don't forget to go to see the doctor. Woman: Oh, it's just a scratch. Q: What does the woman imply?

单选题Woman: Have you seen Kelly around? We were supposed to have lunch. Man: Well, her bag is here on the chair. Q: What does the man imply about Kelly?

单选题(No wonder) that (man's) great dream has been someday to control the weather. The first step toward control is knowledge, and scientists have been (hard at work) for years trying to (keep track for) the weather.

单选题Online dating, it"s now universally agreed, has its limits. In an effort to combat such digital deception tactics, one of the biggest online dating services, Match.com, has decided to get people out from behind their computers to come out and play. Ironic? No. Regular dating has its weaknesses too, including extreme initial awkwardness when two people first meet and the even extremer awkwardness of the next few hours when a date proves to be a nonstarter. Match. corn believes that with its database of single-but-searching folks, its algorithm (配对规则) for finding compatibility, it can put together a heck of a singles mixer. The company has been quietly inviting members to gatherings for the past few years so far, it has hosted about 60 singles events. After all, it knows where the singles are, and it knows what they say they like. So encouraged has Match been by the results, it has just launched an event service known as Stir, which will host 2,000 to 3,000 singles parties a year, hitting 24 cities in June and 70 in September. Since everyone at the events is looking for a date, the awkwardness is a shared burden and will be easier to shrug off, reasons the company. Also, the dating service is digging deep into its database of 3 million singles, so it can slice and dice the guest list. If it wanted to host a singles event on the south side of Topeka in which everybody was a single parent between the ages of 30 and 40 with an interest in Shar-Pei breeding, it could do that—all while making sure that the ratio of male to female dog lovers is perfectly balanced. Many companies have already tried to turn their online presence into a singles meet-up business. Match.com"s advantage here is the size of its singles pool and the depth of information it has about their preferences. Match"s VP of Strategy and Analytics Amarnath Thombre says the Stir meet-ups are not in response to recent studies that have questioned the effectiveness of compatibility algorithms such as the one Match.com offers but a natural area of development for a company that just wants to get people together. Nevertheless it seems to suggest that online dating might have found its natural limits; it cannot find a mathematical formula for chemistry. To say the dating company has high ambitions for Stir is an understatement. Match considers its foray into the offline world the biggest news in its 17 years of existence. "We will be the largest singles event company in the world," predicts Match. com president Mandy Ginsberg. "We could potentially serve half a million people a year." She also excited about stimulating local economies and revitalizing downtown areas by bringing customers to the local bars where the gatherings take place.

单选题A: Oh...um...do you mind if I smoke? B: ______ A: Oh, I didn't notice. B: Mum. There's a sign on the door.

单选题Should English classes be {{U}}compulsory{{/U}} at the elementary or primary school level in countries where it is not the native langue?

单选题As my fine professor of economics Lowell Harriss used to tell us, economics is the study of the allocation of scarce goods and services. What could be scarcer or more precious than love? It is rare, hard to come by and often fragile. My primary life study has been about love. Second comes economics, so here, in the form of a few rules, is a little amalgam (统一体) of the two fields: the economics of love. In general, and with rare exceptions, the returns in love situations are roughly proportional to the amount of time and devotion invested. The amount of love you get from an investment in love is correlated, if only roughly, to the amount of yourself you invest in the relationship. If you invest caring, patience and unselfishness, you get those things back. High-quality bonds consistently yield more return than junk, and so it is with high-quality love. As for the returns on bonds, I know that my comment will come as a surprise to people who have been brainwashed into thinking that junk bonds are free money. They aren"t. The data from bond research, W. Braddock Hickman, shows that junk debt outperforms high quality only in rare situations, because of the default risk. In love, the data is even clearer. Stay with high-quality human beings. And once you find that you are in a junk relationship, sell immediately. Junk situations can look appealing and seductive, but junk is junk. Be wary of it unless you control the market. In every long-term romantic situation, returns are greater when there is a monopoly. If you have to share your love with others, if you have to compete even after a brief while with others, forget the whole thing. You want to have monopoly bonds with your long-term lover. At least most situations work out better this way. The returns on your investment should at least equal the cost of the investment. If you are getting less back than you put in over a considerable period of time, back off. To coin a phrase: Fall in love in haste, repent at leisure.

单选题{{B}}Passage Two{{/B}} Despite not being terribly smart as individuals, wasp (黄蜂) colonies build and maintain a complex nest that lasts many generations. Just how these social wasps coordinate this task has always been a mystery. But now a mathematical model suggests that one key factor drives their behavior: the amount of water in the nest. Social wasps cannot learn from one another—unlike bees, which use a complex dance to tell nest mates where sources of nectar (花蜜) are. Nor do they use pheromones (信息素) the way ants do to lead other ants to food. Robert Jeanne of the University of Wisconsin-Madison proposed that wasps set up a demand-driven chain of information. At the end of the chain, builder wasps monitor the nest and when necessary, request pulp from pulp forager wasps. They in turn demand water from water foragers in order to make the pulp. But biologist Istvan Karsai of East Tennessee State University in Johnson City, Tennessee, and his team found that social wasps in Panama don't actually work that way. They removed either builders or pulp foragers from a colony of a species called Metapolybia aztecoides. Although that should break up the so-called information chain, it did not significantly alter the amount of water being brought into the nest. They also found that the wasps could change roles, something that Jeanne didn't expert. For instance, when the researchers sprayed a surplus of water onto the nest, water foragers quickly became builders, and nest building increased. Based on their observations, Karsai's team developed a mathematical model that shows that wasps achieve their complex behaviour simply by monitoring the level of water in the nest—what he calls the"common stomach" of the colony. He believes wasps infer what the level is when they exchange fluids on meeting each other, a behaviour called trophallaxis that is common in many social insects. To test the model, Karsai simulated changes in the model colony, for example by removing pulp foragers or builders. "What's interesting is that in every case the model responds like the actual colony in Panama, "says Karsai.

单选题Once a political system has been Ucorrupted/U right from the very top leaders to the lowest ranks of the government, the problem is very complicated.

单选题A: Do you happen to know what's on after the news?B: ______

单选题To conserve energy, estate developers are encouraged to build houses that can Uretain/U heat in winter.

单选题He will abide by his promise if he gives it.

单选题{{U}}Presumably{{/U}}, excessive consumption of fried foods has serious consequences as has been proved.

单选题After (attracting) more than a million marchers-(four times of the size) of the historical 1963 March on Washington-the 2004 March for Women's Life (became) the largest mass demonstration (in history).

单选题We find that bright children are rarely held back by mixed-ability teaching. On the contrary, both their knowledge and experience are enriched. We feel that there are many disadvantages in streaming (把……按能力分班) pupils. It does not take into account the fact that children develop at different rates. It can have a bad effect on both the bright and the not-so-bright child. After all, it can be quite discouraging to be at the bottom of the top grade! Besides, it is rather unreal to grade people just according to their intellectual ability. This is only one aspect of their total personality. We are concerned to develop the abilities of all our pupils. To the full, not just their academic ability. We also value personal qualities and social skills, and we find that mixed-ability teaching contributes to all these aspects of learning. In our classrooms, we work in various ways. The pupils often work in groups: this gives them the opportunity to learn to co-operate, to share, and to develop leadership skills. They also learn how to cope with personal problems as well as learning how to think, to make decisions, to analyze and evaluate, and to communicate effectively. The pupils learn from each other as well as from the teacher. Sometimes the pupils work in pairs; sometimes they work on individual tasks and assignments, and they can do this at their own speed. They also have some formal class teaching when this is appropriate. We encourage our pupils to use the library, and we teach them the skills they need in order to do this efficiently. An advanced pupil can do advanced work: it does not matter what age the child is. We expect our pupils to do their best, not their least, and we give them every encouragement to attain this goal.

单选题Economists believe that the jobless total will ______ to 3.5 million by the spring.

单选题Woman: Good morning, sir. The usual? Man: Yes, please, Ann

单选题Vast amounts of money are being invested in the local market.