单选题Research discovered that plants infected with a virus give off a gas that______ disease resistance in neighboring plants.

单选题Let's visit. the bookstore in our way back home,______?

单选题 风筝 风筝起源于中国，在这个国家，制作风筝的理想材料一应俱全：丝织品用来做帆，极具韧性的(high-tensile-strength)线可以制作风筝线，轻盈的骨架则由韧性十足的竹子制成。据说，风筝是墨子和鲁班在公元前5世纪时发明的。在13世纪末期，马可·波罗首次将与风筝有关的故事介绍到欧洲。尽管风筝最初只被看作是珍奇物品(curiosity)，但自18世纪开始，风筝已经被用作科研工具。现在，风筝节已经成为一种流行的娱乐形式，最为著名的就是中国的潍坊风筝节。

单选题Anyone who has searched for a job fresh out of college knows how difficult it is to get that first job. Sending out hundreds of resumes, only to get a few interviews in the end—if you"re lucky!—and if you"re very lucky, eventually there"s a job offer on the table. Should you grasp it, or wait for something better to come along the way? It depends on whether you are a "maximizer" or a "satisficer". Maximizers want to explore every possible option before choosing a job. They gather every stick of information in the hope of making the best possible decision. If you are a satisficer, however, you make decisions based on the evidence at hand. Simply put, satisficers are more likely to cut their job search short and take the first job offer. Maximizers are more likely to continue searching until a better job offer comes along. Which type of approach yields the better payoff?. A maximizer. Specifically, quoting the results of a study of the job search of 548 members of the Class of 2002 by Sheena Iyengar, Rachael Wells, and Barry Schwartz, the maximizers put themselves through more contortions in the job hunt. They applied to twenty jobs, on average, while satisficers applied to only ten, and they were significantly more likely to make use of outside sources of information and support. But it turned out to be worth it: the job offers they got were significantly better, in terms of salary, than what the satisficers got. Satisficers were offered jobs with an average starting salary of $37,085; the average starting salary offered to maximizers was $44,515, more than 20 percent higher. The trouble is, however, that higher pay doesn"t make maximizers a happier group than satisficers. In fact, maximizers were significantly more likely than satisficers to be unhappy with the offers they accepted. Evidently, being a maximizer can help you earn more income, but that income doesn"t buy more happiness, as the maximizer"s likely to agonize over the prospect of a better job offer out there he or she missed. Maximizers may have objectively superior outcomes, but they"re so busy obsessing about all the things that they could have had, they tend to be less happy with the outcomes they do get.

单选题For my proposed journey, the first priority was clearly to start learning Arabic. I have never been a linguist. Though I had traveled widely as a journalist, I had never managed to pick up more than a smattering of phrases in any tongue other than French, and even my French, was laborious for want of lengthy practice. The prospect of tackling one of the notoriously difficult languages at the age of forty, and trying to speak it well, both deterred and excited me. It was perhaps expecting a little too much of a curiously unreceptive part of myself, yet the possibility that I might gain access to a completely alien culture and tradition by this means was enormously pleasing. I enrolled as a pupil in a small school in the center of the city. It was run by a Mr Beheit, of dapper appearance and explosive temperament, who assured me that after three months of his special treatment I would speak Arabic fluently. Whereupon he drew from his desk a postcard which an old pupil had sent him from somewhere in the Middle East, expressing great gratitude and reporting the astonishment of local Arabs that he could converse with them like a native. It was written in English. Mr Beheit himself spent most of his time coaching businessmen in French, and through the thin, partitioned walls of his school one could hear him bellowing in exasperation at some confused entrepreneur: "Non, M. Jones. Jane suis pas francais. Pas, Pas, Pas!" (No Mr. Jones, I'm NOT French, I'm not, not, NOT!). I was gratified that my own tutor, whose name was Ahmed, was infinitely softer and less public in approach. For a couple of hours every morning we would face each other across a small table, while we discussed in meticulous detail the colour scheme of the tiny cubicle, the events in the street below and, once a week, the hair-raising progress of a window-cleaner across the wall of the building opposite. In between, hearing in mind the particular interest I had in acquiring Arabic, I would inquire the way to some imaginary oasis, anxiously demand fodder and water for my camels, wonder politely whether the sheikh was prepared to grant me audience now. It was all hard going. I frequently despaired of ever becoming anything like a fluent speaker, though Ahmed assured me that my pronunciation was above average for a Westemer. This, I suspected, was partly flattery, for there are a couple of Arabic sounds which not even a gift for mimicry allowed me to grasp for ages. There were, moreover, vast distinctions of meaning conveyed by subtle sound shifts rarely employed in English. And for me the problem was increased by the need to assimilate a vocabulary, that would vary from place to place across five essentially Arabic-speaking countries that practiced vernaculars of their own: so that the word for "people", for instance, might be nais, sah 'ab or sooken. Each day I was mentally exhausted by the strain of a morning in school, followed by an afternoon struggling at home with a tape recorder. Yet there was relief in the most elementary forms of understanding and progress. When merely got the drift of a torrent which Ahmed had just released, I was childishly elated. When I managed to roll a complete sentence off my tongue without apparently thinking what I was saying, and it came out right, I beamed like an idiot. And the enjoyment of reading and writing the flowing Arabic script was something that did not leave me once I had mastered it. By the end of June, no-one could have described me as anything like a fluent speaker of Arabic. I was approximately in the position of a fifteen-year old who, equipped with a modicum of schoolroom French, nervously awaits his first trip to Paris. But this was something I could reprove upon in my own time. I bade farewell to Mr Beheit, still struggling to drive the French negative into the still confused mind of Mr Jones.

单选题Although he has had no formal education, he is one of the ______ businessmen in the company.

单选题Professor Wang, ______ for his informative lectures, was warmly received by his students. A. knowing B. known C. to be known D. having known

单选题Antique furniture ______ .

单选题Technology has ______ the sharing, storage and delivery of information, thus making more information available to more people.

单选题Jack: I'd like a haircut, please.Barber: Would you care for a shave and a shampoo as well?Jack: ______. A haircut will be just fine.

单选题Many superstitious people are afraid of black cats. They believe that black cats have a strange power. If a black cat crosses their path, they think they will have bad luck. Black cats haven't always had such a bad reputation. Long ago, the Egyptians thought that black cats were holy animals. They even worshipped them. Pasht was an Egyptian goddess who had a woman's body and a cat's head. Because the Egyptians had so much respect for black cats, they often buried the sacred creatures with great ceremony. Mummies of cats have often been found in ancient cemetery ruins. To keep the cats company after they died, mice were sometimes buried beside them. Feelings about black cats have always been strong. People have thought they were either very good or very bad. The people of Europe, in the Middle Ages, believed black cats were the evil friends of witches and the Devil. Witches were said to have the power to change themselves into black cats. People believed that you could not tell whether a black cat was just a cat, or whether it was a witch disguising herself as she plotted some evil scheme. The brain of a black cat was thought to be a main ingredient in witch's brew. Unlike their ancestors of the Middle Ages, Englishmen today consider black cats to be good luck charms. Fishermen's wives often keep a black cat around so that their husbands will be protected when they are out at sea.

单选题I"m ______ in this argument: I don"t care who wins.

单选题1 don't think it is any use ______ this matter any further.

单选题A．outstanding B．Unfortunately C．promoting D．sauce E．organized F．annual G．Overwhelming H．injuries I．mean J．impaired K．unwillingness L．convince M．excluded N．source O．indulging About 50 years ago, the idea of disabled people doing sports was never heard of. But when the 42 games for the disabled were started at Stoke Mandeville, England in 1948 by Sir Ludwig Guttmann, the situation began to change. Sir Ludwig Guttmann, who had been driven to England in 1939 from Nazi Germany, had been asked by the British government to set up a(n) 43 centre at Stoke Mandeville Hospital near London. His ideas about treating injuries included sports for the disabled. In the first games just two teams of injured soldiers took part. The next year, 1949, five teams took part. From those beginnings things developed fast. Teams now come from abroad to Stoke Mandeville every year. In 1960 the first Olympics for the Disabled were held in Rome. Now, every four years the Olympic Games for the Disabled are held, if possible, in the same place as the normal Olympic Games, although they are 44 separately. In other years Games for the Disabled are still held at Stoke Mandeville. In the 1984 Wheelchair Olympic Games, 1604 wheelchair athletes from about 40 countries took part. 45 , they were held at Stoke Mandeville and not in Los Angeles, along with the other Olympics. The Games have been a great success in 46 international friendship and understanding, and in proving that being disabled does not 47 you can't enjoy sports. One small 48 of disappointment for those who organize and take part in the games, however, has been the 49 of the International Olympic Committee to include the disabled events at the Olympic Games for the able bodied. Perhaps a few more years are still needed to 50 those fortunate enough not to be disabled that their disabled fellow athletes should not be 51 .

单选题He Umerely/U meant to give his opinion, not to start an argument.

单选题 Cholera is a preventable waterborne bacterial infection that is spread through ______ water.

单选题To travel from England to Scotland you ______ a passport.

单选题(Annoying) at the long check-out lines, the shopper began (to sigh) loudly, tap his (foot), and (glance) at his watch.

单选题The animates would charge no matter how badly wounded, and in their death struggles, bellowing and rolling from side to side, they seemed to refuse to die.