单选题My father ______ an invitation to a dinner party, but he ______ it.

单选题The clock ______ and we realized it was two o' clock.

单选题According the theory of kin selection, humans tend to act altruistically ______.

单选题Low speed bicycle crashes can badly injure or even kill children if they fall onto the ends of the handlebars so a team of engineers is redesigning the humble handlebar in a bid to make it safer. Kristy Arbogast, a bioengineer at the Children"s Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal (腹部的) injuries in children in the past 30 years showing that more than a third were caused by bicycle accidents. "The task was to identify how the injuries occurred and come up with some countermeasures," she says. By interviewing the children and their parents, Arbogast and her team were able to reconstruct many of the accidents and identified a common mechanism responsible for serious injures. They discovered that most occur when children hit an obstacle at a slow speed, causing them to topple over. To maintain their balance they turn the handlebars through 90 degrees—but their momentum (冲力) forces them into the end of the handlebars. The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen. The solution the group came up with is a handgrip (握柄) fitted with a spring and damping (缓冲的) system. The spring absorbs up to 50 per cent of the forces transmitted through the handlebars in an impact. The group hopes to commercialize the device, which should add only a few dollars to the cost of a bike. "But our task has been one of education because up until now, bicycle manufacturer were unaware of the problem," says Arbogast. The team has also approached the US Consumer Product Safety Commission to try to persuade manufacturers to adopt the new design. A decision is expected later this year.

单选题It was recommended that they ______for the doctor.

单选题 For this part, you are allowed 30 minutes to write a short essay entitled Every Coin Has Two Sides. You can cite examples to illustrate how you understand the above saying. You should write at least 120 words but no more than 180 words.

单选题How to evaluate the performance of students is still a problem that troubles many professors.

单选题(Either) our manager or I (are) (going to) meet you at (the) bus station tomorrow.

单选题The hot spot theory may prove useful in explaining ______.

单选题This passage is primarily about ______.

单选题Our government strongly holds the principle that we will _____ be the first to use nuclear weapons.

单选题It was Jane ______ bought a dictionary from a second-hand book store yesterday.

单选题 中秋节(Mid-Autumn Festival)源自于人们对月亮的崇拜。我国是古老的农业国家，古人经长期观察认为，月亮的运行同农业生产和季节变化有很大关系，因此祭月就成了祈祷国家长治久安的一项重要祭祀活动。在长期的历史进程中，人们在祭月拜月的同时，又出现了赏月的习俗。中秋节成为固定的节日，大约是在唐代。北宋时期，中秋节已经成为普遍的民俗节日。

单选题Listening out for whale song is one way that ships can avoid colliding with whales. But what do you do if the whales aren't singing? One answer, developed by researchers in the Canary Islands, is to focus on the way the giant creatures mask the clamour of ocean noise. No one knows how many whales are killed by ships each year, but collisions are thought to ac- count for up to a third of unnatural deaths. For the northern right whale, this means one or two individuals every year, and with only 300 animals left, that's an unacceptable loss. There are three global hot spots for whale collisions: northern right whales are at risk in the Atlantic off the east coast of the US and Canada, fin whales in the Mediterranean, and sperm whales off the Canary Islands. Last year, the Massachusetts-based international Fund for Animal Welfare attached hydro- phones to buoys and successfully listened out for right whale song in the North Atlantic. But since right whales remain silent for hours at a time, and sperm whales are silent for around haft the time, a better tracking technology is needed. The new Whale Anti-Collision System (WACS), developed by Michel Andre, is designed to help ships in these hot spots steer clear of the whales. It uses a sonar technique called ambient noise imaging to locate the animals even when they are silent. To do this, Andre has been testing a long lines of buoys, each bristling with 32 sensitive under- water microphones, or hydrophones, that pick up sea sounds such as breaking waves, rain and ship- ping noise. Any approaching whale blocks this background noise and creates a detectable "sound shadow". By comparing the reflections received from the hydrophones on different buoys, Andre's system can gather enough information to work out the whale' s position and how fast it is moving. Software displays the results, on a 3D colour map. Underwater objects stand out like hot spots on a thermal image. In trials planned for next year, Andre will place two lines of 12 spherical buoys along the 120-kilometre ferry route between the islands of Tenerife and Gran Canaria. The signals will be sent to a land station where they will be analysed to create a 3D picture of the sea in real time. If the trials are successful, the WACS software could be installed aboard ferries so that ships' masters can steer clear of whales. Failing that, the whales' movements could be tracked from shore- based installation and radioed to ships in the area.

单选题The appearance of the used car is ______, it's much newer than it really is. A. descriptive B. indicative C. deceptive D. impressive

单选题A. It's easy to be complacent (自满的，得意的) about weight and long-term health issues, especially when you're young, carefree and only living for tomorrow, but recent statistics provide a harsh wake-up call for teens and children. B. According to a report produced by the British Medical Association (BMA), the state of adolescent health in the UK is in a poor condition. A key problem is obesity, which is thought to be caused by a poor diet with too many high-fat, high-calorie foods, along with a lack of exercise. In fact, the report claims that excess body weight is 'now the most common childhood disorder in Europe', and a staggering one in five youngsters aged 13 to 16 are overweight and nearly one in five-15-year-olds are obese. C. The figures are worrying as being obese can cause both immediate and future serious health problems. These include the risk of high blood pressure, heart disease and type 2 diabetes. It's also the 'most impotrtant dietary factor in cancer', said a spokesperson for the British Nutrition Foundation (BNF), and can cause complications (并发症) during and after pregnancy. Type 2 diabetes used to only affect middle-aged people, but in recent years cases have been detected in teens as young as 13-year-old for the first time. This, in itself, is believed to be another direct factor linked to the rising levels of obesity. Health Implications D. Neville Rigby, from the International Obesity Task Force, expressed concern at the levels of teen obesity. 'It's very worrying because of the high' risk that people who are obese in their teenage years will continue to be in adulthood', he said. Putting things into perspective, he added, 'Children affected by obesity are likely to have a shorter lifespan than their parents.' E. As well as physical illness and disease, being obese or overweight can cause a range of psychological problems too. The BMA report highlighted that it can significantly affect well-being, 'with many adolescents developing a negative self-image and experiencing low self-esteem.' It can also lead to eating diseases, bullying, depression, and feelings of loneliness and nervousness. This is something that the charity Weight Concern is keen to emphasize. 'Obesity can have detrimental (有害的) effects on children's psychological well-being, ' said a spokesperson. 'Many overweight children report social difficulties, which in turn may contribute to anxiety and depression, and obese children are often subject to teasing and bullying. All this can have devastating effects on their self-esteem.' Weight Distribution F. Doctors use a measurement system called the body mass index (BMI) to assess whether people are a healthy weight, overweight or obese. It's worked out by dividing a person's weight in kilograms by their height in meters squared. For example, if I am 1.7 meters tall and weigh 68 kilos. my BMI would be 23.5 (68 divided by 1.7×1.7), which fails into the desirable or healthy range. Adults (over 18) are overweight if they have a BMI of between 25 and 30, and they are obese if it's 30 or over. As well as BMI levels, the areas where the fat is deposited in the body is important, too, explained a spokesperson for the BNF. People who have extra fat around their middle, a body we call apple-shaped, are at a greater risk of some diseases than those who have most of the extra weight around their hips and thighs, or are pear-shaped. Prevention and Treatment G. When it comes to preventing and treating excess weight and obesity, experts believe a healthy balanced diet and regular exercise are crucial. The key to maintaining a good weight is to balance your energy intake and output, as weight is gained if you regularly eat more than you burn off. Obese children may require a specially developed program, said Weight Concern, which is likely to focus on healthy eating, exercise and social support. In the case of children, it's beneficial for the whole family to adopt healthier behaviors and it's important not to single out a child. H. Likewise, the Royal College of Paediatrics suggests parents should be actively involved in helping children manage their weight, and says obesity problems should be dealt with slowly, by making gradual changes to eating habits and physical activity. Losing weight can be tough, but although crash diets sometimes sound appealing, the Food Standards Agency stress that they don't work. Instead, their top tips for losing weight include eating the recommended five portions of fruit and vegetables each day, cutting down on sugary and fatty foods, opting for lower-fat versions of dairy products and increasing your intake of starchy foods. I. Increasingly inactive lifestyles and couch-potato tendencies, for example watching television and playing computer games, are thought to be contributors to obesity, so being more active is very helpful. The minimum recommended level of activity is at least 30 minutes of moderate-intensity activity, five days a week. Moderate intensity means a state in which your breathing and heart rate are faster than normal. Siobhan Weir, physical activity program manager at the Health Protection Agency said, 'Getting people to take some moderate activity as opposed to being sedentary is likely to have the greatest beneficial effect on their health.' A good form of exercise for those who have been leading fairly inactive lives—and one that s tree—is walking, she says. 'Research shows that walking a mile briskly uses the same energy as running a mile and regular physical activity can reduce weight by as mush as one stone in three months. To really reap the benefits, aim to walk briskly so that you are feeling warmer and slightly out of breath.' If walking isn't for you, there's a whole range of other activities available, from team sports such as football, hockey or basketball, classes such as aerobics or sessions at the gym, to alternatives such as martial arts, yoga or tai chi. The key is to find something you enjoy and stick to it. J. It's easy to put off healthy eating habits and exercise, but the sooner we start, the better the outcome for our health. By starting at a young age, the chances are good habits will continue into the future, too.

单选题 Directions: For this part, you are allowed 30 minutes to write on the topic EQ (Emotional Quotient). You should write at least 120 words but no more than 180 words.

单选题Mary：We couldn’t ask for a better day，could we?John：I know. 56__________.I love this time of the year.Mary：This bus seems to be running late，doesn’t it? 57 ____请作答此空______ ?John：Ive been here for

单选题In the opening paragraph, the author introduces his topic by

单选题All of the following can be inferred from the passage about the American society before the 1890s except that ______.