填空题 {{B}}Questions 47 to 56 are based on the following passage.{{/B}} The researchers put all the plants in a greenhouse to grow under normal conditions for forty days. Then, for fifteen days after that, the plants did not receive any{{U}} (47) {{/U}}. The normal plants lost their green color. Finally, they lost their leaves. But the researchers say the{{U}} (48) {{/U}}plants kept their leaves and their{{U}} (49) {{/U}}. After the fifteen dry days, all the plants were watered again for a week. The transgenic plants returned to{{U}} (50) {{/U}}growth, and their seed production was close to normal But the other plants all died. Rosa Rivera says the transgenic plants kept a{{U}} (51) {{/U}}high water level. They also{{U}} (52) {{/U}}to produce energy during the dry period, although at a reduced level. The amount of seeds they produced was close to normal. In addition, the researchers found that the plants could{{U}} (53) {{/U}}on only thirty percent of the normal amount of{{U}} (54) {{/U}}water. Yield loss was minor, they said. The{{U}} (55) {{/U}}appeared late last year in the Proceedings of the National Academy of Sciences. The University of California has applied for patent{{U}} (56) {{/U}}for the technology. The researchers expect to move forward with field testing of the transgenic tobacco in late August. They hope for similar results with crops like tomatoes, rice, wheat and cotton. A) similar I) color B) keep J) production C) water K) level D) relatively L) findings E) normal M) continued F) survive N) protection G) gained O) irrigation H) transgenic

填空题Yuletide refers to several days before and after Christmastime.

填空题Chinese oil giant CNOOC has emerged Unocal last year with US $18.

填空题An El Nino causes a permanent change in the climate of the Atlantic Ocean, in the region around the equator.

填空题The manager said that at least three applicants ________________(看上去似乎值得他们考虑).

填空题A minute ago the old lady ______ (撕开信封)with great excitement.

填空题The skyscraper, as the signal achievement of America architecture, seems to be getting into a state of gradual decline following its glory.

填空题You may write some special cues in your speaking outline in order to direct and ______.

填空题If a mother doesn' t love her child, she will not have a mother' s intuition.

填空题Scientists Weigh Options for Rebuilding New Orleans As experts ponder how best to rebuild the devastated(毁坏)city, one question is whether to wall off--or work--with--the water. Even before the death toll from Hurricane Katrina is tallied, scientists arc cautiously beginning to discuss the future of New Orleans. Few seem to doubt that this vital heart of U.S. commerce and culture will be restored, but exactly how to rebuild the city and its defenses to avoid a repeat catastrophe is an open question. Plans for improving its levees and restoring the barrier of wetlands around New Orleans have been on the table since 1998, but federal dollars needed to implement them never arrived. After the tragedy, that's bound to change, says John Day, an ecologist at Louisiana State University (LSU) in Baton Rouge. And if there is an upside to the disaster, he says, it's that "now we've got a clean slate to start from." Many are looking for guidance to the Netherlands, a country that, just like bowl-shaped New Orleans, sits mostly below sea level, keeping the water at bay with a construction of amazing scale and complexity. Others, pointing to Venice's longstanding adaptations, say it's best to let water flow through the city, depositing sediment to offset geologic subsidence--a model that would require a radical rethinking of architecture. Another idea is to let nature help by restoring the wetland buffers between sea and city. But before the options can be weighed, several unknowns will have to be addressed. One is precisely how the current defenses failed. To answer that, LSU coastal scientists Paul Kemp and Hassan Mashriqui are picking their way through the destroyed city and surrounding region, reconstructing the size of water surges by measuring telltale marks left on the sides of buildings and highway structures. They are feeding these data into a simulation of the wind and water around New Orleans during its ordeal. "We can't say for sure until this job is done," says Day, "but the emerging picture is exactly what we've predicted for years." Namely, several canals--including the MRGO, which was built to speed shipping in the 1960s--have the combined effect of funneling surges from the Gulf of Mexico right to the city's eastern levees and the lake system to the north. Those surges are to blame for the flooding. "One of the first things we'll see done is the complete backfilling of the MRGO canal," predicts Day, "which could take a couple of years." The levees, which have been provisionally repaired, will be shored up further in the months to come, although their long-term fate is unclear. Better levees would probably have prevented most of the flooding in the city center. To provide further protection, a mobile clam system, much like a storm Surge barrier in the Netherlands, could be used to close off the mouth of Lake Pontchartrain. But most experts agree that these are short-term fixes. The basic problem for New Orleans and the Louisiana coastline is that the entire Mississippi River delta is subsiding and eroding, plunging the city deeper below sea level and removing a thick cushion of wetlands that once buffered the coastline from wind and waves. Part of the subsidence is geologic and unavoidable, but the rest stems from the levees that have hemmed in the Mississippi all the way to its mouth for nearly a century to prevent floods and facilitate shipping. As a result, river sediment is no longer spread across the delta but dumped into the Gulf of Mexico. Without a constant stream of fresh sediment, the barrier islands and marshes are disappearing rapidly, with a quarter, roughly the size of Rhode Island, already gone. After years of political wrangling, a broad group pulled together by the Louisiana government in 1998 proposed a massive $14 billion plan to save the Louisiana coasts, called Coast 2050 (now modified into a plan called the Louisiana Coastal Area project). Wetland restoration was a key component. "It's one of the best and cheapest hurricane defenses," says Day, who chaired its scientific advisory committee. Although the plan was never given more than token funding, a team led by Day has been conducting a pilot study since 2000, diverting part of the Mississippi into the wetlands downstream of the city. "The results are as good as we could have hoped," he says, with land levels rising at about 1 centimeter per year--enough to offset rising sea levels, says Day. Even if the wetlands were restored and new levees were built, the combination of geologic subsidence and rising sea levels will likely sink New Orleans another meter by 2100. The problem might be solved by another ambitious plan, says Roel Boumans, a coastal scientist at the University of Vermont in Burlington who did his Ph.D. at LSU: shoring up the lowest land with a slurry of sediment piped in from the river. The majority of the buildings in the flooded areas will have to be razed anyway, he says, "so why not take this opportunity to fix the root of the problem?" The river could deposit enough sediment to raise the bottom of the New Orleans bowl to sea level "in 50 to 60 years," he estimates. In the meantime, people could live in these areas Venice-style, with buildings built on stilts. Boumans even takes it a step further: "You would have to raise everything about 30 centimeters once every 30 years, so why not make the job easier by making houses that can float." Whether that is technically or politically feasible--Day, for one, calls it "not likely"--remains to be seen, especially because until now, the poorest residents lived in the lowest parts of the city. Any decision on how best to protect the city in the future will be tied to how many people will live there, and where. "There may be a large contingent of residents and businesses who choose not to return," says Bill Good, an environmental scientist at LSU and manager of the Louisiana Geological Survey's Coastal Processes section. It is also not yet clear how decisions about the reconstruction will be made, says Good, "Since there is no precedent of comparable magnitude." Every level of government is sure to be involved, and "the process is likely to be ad hoc." Even with the inevitable mingling of science and politics, we still have "a unique chance to back out of some bad decisions," says Good, who grew up in New Orleans. "I hope that we don't let this once-in-history opportunity slip through our fingers in the rush to rebuild the city./

填空题Those naughty boys were caught _____________ (在花园偷花).

填空题{{B}}Section B{{/B}}{{B}}Passage One{{/B}} Here's some good news for parents of tweens and teens: You rule. That may be hard to believe sometimes. And it's true kids won't always follow your health and safety rules. But studies show parents who keep setting boundaries make a huge difference. The latest example is a survey on media use by the Kaiser Family Foundation. It found that typical kids ages 8 to 18 spend an astonishing 7 hours and 38 minutes a day consuming entertainment media, indulging deeply in TV, computers, games, cellphones, music players and other devices while occasionally glancing at books and other non-electronic media. Many experts, including the pediatrics(小儿科) academy, consider that much screen time bad for mental and physical health. But the study also found that kids whose parents set any time or content limits were plugged in for three hours less each day. "Parents can have a big influence," says Kaiser researcher Vicky Rideout. "The reality is that teenagers care deeply what their parents think," says Kenneth Ginsburg, a specialist of the Children's Hospital of Philadelphia. "The challenge for parents is to get across rules and boundaries in a way that doesn't feel controlling." Research shows that parents who set firm rules but explain and enforce in a warm supportive way work better than those who set no rules, fail to enforce them or rule with a "because I said so" iron grip. Ideally, "kids understand the rules are about their well-being and safety," Ginsburg says. Still, achieving just-right parenting is "challenging", says Margaret Broe-Fitzpatrick, a teacher in Kensington, Md., who has four children, ages 8 to 16. "There are so many different things to keep track of." She and her husband keep their kids busy with sports and other activities, limit screen time and review the music their children download. They talk with their 16-year-old son about the rules he'll face when he gets a driver's license soon. But, she says, they can't police everything the kids encounter on the Internet or in friends' homes. "We're just doing the best we can," she says, "even if young people may protest at first, they do feel more safe and secure when limits are set."

填空题The festive break is fast becoming a distant memory and for many, New Year fitness regimes are too. Despite 2.6m people starting diets on New Year"s Day, research suggests that by the end of the week 92 percent of dieters gave up, 1 exercise and gorging on comfort food. Findings, 2 by weightloss firm XLS-Medical, suggest that the 3 majority are unsuccessful at sticking to their diets for more than five days a week. Two out of 10 dieters 4 they have their first diet relapse (退步) just four to five days in, with hunger cited as the main cause. Boredom and alcohol were 5 blamed for people failing to keep their health kick on track. Dr. Matt Capehorn, Clinical Director of the National Obesity Forum, 6 that just one day off from dieting can undo a week"s worth of hard work. He told Female First : "A healthy diet, aimed at losing l1b per week, relies on saving 3500 calories a week by having 500 calories less each day." "A day off the diet should mean that you eat the correct amount, but many dieters see it as an excuse to binge (大吃大喝) and have thousands of calories more than they need." The results suggest that a 7 590,000 could already have 8 to stick to New Year diet resolutions. And a vast majority are unaware of the negative impact a single day off can have on their weight loss efforts. Yet 9 it was found only 5 percent of women stick to their diets until they"ve 10 their target weight. A. massive B. reached C. highlighted D. blamed E. shunning F. still G. released H. lost I. also J. admitted K. treated L. dieted M. overall N. vast O. failed

填空题Our conclusion is based on all available knowledge,____________(而不是基于猜测和想像).

填空题Kodak Theatre hosted its first Academy Awards Presentation in November of 2001.