单选题Seeing______pictures, she couldn't help thinking of______happy days in______ ViennA．

单选题The pictures of the Loch Ness Monster show a remarkable resemblance to a plesiosaur, a large water reptile of the Mesozoic era presuming extinct for more than 70 million years.

单选题Roger Federer Lights up the Arabian Night 罗杰·费德勒点亮阿拉伯之夜 Plenty of people will be glad Tim Henman was not here to trouble Roger Federer once more last night，as the seedings said he should have been.Popular with the expatriates though he may be，and capable of upsetting Federer though he undoubtedly is，there is nothing quite so stirring as seeing one of the most gifted world No l s of all in full cry. Instead of struggling with his jinx player，Federer imposed a spell of his own.He beat Andrei Pavel，whom Henman beat in the Paris Masters final，by6-3，6-3，and strode the court like a ruler who knows his aura is expanding. It carried the Swiss imperiously into a semi-finals of the Dubai Championships，where he will face Jarkko Nieminen.The Finn earned his place by defeating the Dutch No 8 seed Sjeng Schalken 6-3,6-3. Federer insisted he was not at his best-"I haven't wanted to chase the fines as much as I should，"he said. Pavel was driven to distraction as it was.He had akeady lifted himself near the level he showed when he was in the top 20.But just when he looked as if he might prolong the second set， Federer struck. He retrieved one ball from deep，outside the tramlines on the forehand side，turned and reached the next ball from short and outside the tramlines on the backhand side，and still somehow hit a controlled winner.It completed the decisive break of serve. Pavel responded by launching a spare ball towards the sky and it landed on the whiskey tables in the lrish village below.The umpire uttered a code violation warning in little more than a whisper.It was as though he felt sympathy for the Romanian. If Federer reaches tomorrow's final he will play Spain's Feliciano Lopez，whose Davis Cup debut came in the singles in the 2003 final in Melbourne，or Mikhail Youzhny，whose first Davis Cup experience was as a ball boy in the 1995 final in Moscow. That spurred Youzhny to make a top-level breakthrough seven yearslater，and to develop perseverance which has been revealed this week in a 6-3，1-6，6-1 quarter-final win over Rafael Nadal yesterday in heat which would have made a camel protest，and in a recovery from two days'vomiting after eating Japanese seafood."My cap felt as if it weighed five kilos."he said.

单选题While many studies indicate that remotely sensed data provide cost-effective and up-to-date information in managing earth resources, use of the Utremendous/U amount of already available data in meaningful applications has not reached its full potential.

单选题The trapeze artist who ran away with the clown {{U}}broke up{{/U}} the lion tamer's heart.

单选题Smoke particles and other air pollutants are often trapped in the atmosphere, thus forming dirty fog.

单选题Standard English is the variety of English which is usually used in print and which is normally taught in schools and to non-native speakers learning the language. It is also the variety which is normally 21 by educated people and used in news broadcasts and other 22 situations. The difference between standard and non-standard, it should be noted, has 23 in principle to do with differences between formal and colloquial 24 ; standard English has colloquial as well as formal variants. 25 , the standard variety of English is based on the London 26 of English that developed after the Norman Conquest resulted in the removal of the Court from Winchester to London. This dialect became the one 27 by the educated, and it was developed and promoted 28 a model, or norm, for wider and wider segments of society. It was also the 29 that was carried overseas, but not one unaffected by such export. Today, 30 English is arranged to the extent that the grammar and vocabulary of English are 31 the same everywhere in the world where English is used; 32 among local standards is really quite minor, 33 the Singapore, South Africa, and Irish varieties are really very 34 different from one another so far as grammar and vocabulary are 35 . Indeed, Standard English is so powerful that it exerts a tremendous 36 on all local varieties, to the extent that many of long-established dialects of England have 37 much of their vigor and there is considerable pressure on them to be 38 . This latter situation is not unique 39 English: it is also true in other countries where processes of standardization are 40 . But it sometimes creates problems for speakers who try to strike some kind of compromise between local norms and national, even supranational (跨国的) ones.

单选题The implication in this passage is that ______

单选题Once you have developed a good study habit, try to keep it______.

单选题The student asked her professor if he would have gone on the space ship {{U}}he did know{{/U}} earlier.

单选题At last John Smith chose to step down as the company's chief executive and return to his roots in software research.

单选题The Polynesians, who colonized Hawaii sometime between A． D． 500 and A． D． 1000, found uses for many {{U}}indigenous{{/U}} plants.

单选题Table tennis is easy to learn, and, {{U}}by the same token{{/U}}, boys don't need a lot of space to practice it.

单选题People whose property {{U}}is stolen{{/U}} should report to the police.

单选题 The "Karat" marking on jewelry tells you what proportion of gold is mixed with other metals, ff 14 parts of gold are mixed with 10 parts of base metal, the combination is called 14-Karat (14K) gold. The higher the Karat rating, the higher the proportion of gold in the object. The lowest Karat gold that can be marketed in the United States is 10-Karat gold. Jewelry does not have to be marked with its Karat quality, but most of it is. ff there is a Karat quality mark, next to it must be the U.S. registered trademark of the person or company that will stand behind the mark, as required by the National Gold and Silver Stamping Act.

单选题In spite of ill health and a physical Udisability/U that threatened her career, Carson McCullers completed a novel in the summer of 1961 that made the best-seller list.

单选题If you had been more careful in typing the report, you______to do it over again.

单选题But if you allow me to be frank, it's the people, especially, the younger generation that I'm ______.

单选题Sam, an university student, invented a new medical instrument.

单选题Celebrate. Celebrate. Physicians are delighted with a Food and Drug Administration (FDA) advisory panel"s recommendation earlier this year that Vioxx and its cousins Bextra and Celebrex (all medicines known as Cox-2 inhibitors) should remain on the market , despite evidence they increase heart disease risk in some people. The panelists reached their decision after weighing all the data and concluding the benefits of these pain-relieving drugs outweighed the risks. Specifically, these scientists acknowledged that, for some patients, these prescription drugs were uniquely effective in reducing pain from arthritis and other causes. For others—concerned about ulcers associated with aspirin and other OTC analgesics—the Cox-2 inhibitors offered the advantage of minimizing potentially serious effects of stomach irritation. Now is an appropriate time for everyone to take a fresh look at the benefit-risk equation for Vioxx and the other Cox-2 inhibitors. The risks, increased risk of heart disease in some who use the drugs—have been well publicized. Much less publicity has been given to a spectrum of real and potential benefits that go way beyond reduced risk of stomach irritation. These little—discussed benefits would have been lost, perhaps permanently—had Vioxx, Bextra and Celebrex been driven from shelves in pursuit of perfect safety, an unattainable goal. For example, there is substantial evidence Cox-2 inhibitors can reduce development of colon polyps, which may become colon cancer indeed. Celebrex is FDA-approved for those genetically prone to colon cancer. Ironically, the 2004 study that revealed the elevated heart attack risk of Vioxx was primarily designed to further establish the drug"s effectiveness in protecting against colon cancer. And while the results of that interrupted trial have not yet been published, there is good reason to believe they will confirm the protective effects against colon cancer established in research over the last 10 years. At the time of its withdrawal from the market last fall, studies of Vioxx as well as the other Cox-2 drugs suggest that they had other anti-cancer properties as well, possibly reducing the risk of malignancies of a number of sites, including the lung and esophagus. Had these drugs been dismissed, their untapped promise for prevention would have evaporated well before it was evaluated and applied to save lives. Fortunately, cooler and wiser heads prevailed.