单选题______care would have prevented it.

单选题All of them are ______ at Lana"s achievement.

单选题Scientists have been struggling to find out the reason behind blushing （脸红）。Why would humans evolve（进化） a 21__________ that puts us at a social disadvantage by ____请作答此空______ us to reveal that we hav

单选题 Now listen to the following recording and answer questions24-26.

单选题Thousands of children nowadays prefer doing their homework to a background of pop-music ______ it in a quite room.

单选题I knew I could not finish my homework

单选题Despite the doubts, and despite complaints from shop owners, London's congestion charge --introduced in February 2003 -- has managed to ease the gridlock in the city centre. Traffic is down by 18%, jams by 30%. The scheme's biggest weakness is that it is crude: drivers pay ￡ 8 ($14) to enter the zone between 7am and 6:30pm, regardless of how congested the roads are, or how long they stay. So road-pricing fans are watching trials by Transport for London (TfL) of a new detection system, called tag-and-beacon, with interest. Under such a scheme (used in Singapore and on some European roads) cars are fitted with electronic tags that are read by roadside masts. If the trial is successful, TfL says that the city could switch to the system once the contract to run the congestion charge is re-let in 2009. Currently, cameras are used to read license plates and track motorists. They are not always reliable: an individual camera identifies only around 70% of cars. Most driven get photographed more than once, which boosts the system's effectiveness to over 95%, but that still leaves several thousand vehicles per day whose details must be laboriously checked by hand. Tag-and-beacon technology is much more accurate, with an identification rate of over 99%. TfL says the trial is partly designed to see whether the new system could allow drivers to pay charges by direct debit. That would be popular with motorists, who complain that the current payment system is unfriendly: the toll for a day' s travel must be paid manually -- online, by phone or in a shop -- by midnight, with steep fines levied on forgetful drivers. More precise detection also allows for more precision in policy, and road-pricing enthusiasts see radical possibilities ahead. TfL says it is considering using the new technology to charge drivers each time they cross the zone boundary (up to a daily maximum), instead of paying once for an entire day's travel. That would be cheaper for drivers who make few trips into the zone, although drivers who spend a long time trundling around without leaving (thereby causing the most congestion) would get off lightly, too. Further refinements may be possible. The current system has cut traffic most drastically in the middle of the day, when congestion is at its lowest. Demand for road space would better match supply if charges were variable -- high at the busiest times of day and low in quiet periods. Such a time-sensitive, variable-charging scheme using a tag-and-beacon system was endorsed last year by Bob Kiley, the TfL's boss, who also said that he wanted to extend the congestion charge to other parts of London. That would be controversial, and Mr. Kiley's underlings were quick to insist that his musings were not official policy. But the original scheme was controversial too, yet Ken Livingstone, London's mayor and its biggest backer, was re-elected after introducing it. It would be a shame if timidity took hold now.

单选题Leading cadres launch rectification campaigns at regular ______ to hear the masses' views.

单选题A: I'm terribly sorry, Professor. Could I have an extra day or two for the assignment? My computer broke down last night.B: ______

单选题Laura, who comes from a wealthy family, spends most of her time enjoying herself, but takes ______ pains with her lessons.

单选题"Our life is ______ away by detail. Simplify, simplify. " That dictum of Henry David Thoreau's, echoing from the days of steamboats and ox-drawn plows, had long haunted me.

单选题 西安，是中国陕西省的省会，历经了许多朝代的沉浮。它曾断断续续地作为13个朝代的首都达1200多年之久。西安的历史古迹使得游客想起这座城市的昔日辉煌。西安悠久辉煌的历史丰富了中国古代史的发展，进一步推动了中华文明的前进。今天，西安已是全国主要的旅游胜地之一，每年接待海内外旅游者约200万人次。在西安，遍布城内外的历史古迹和自然风景数不胜数，如驰名中外的兵马俑(Terra Cotta Warriors)、明代城墙、乾陵(Qian Mausoleum)等等。

单选题______ another generation from that of their parents, young people have different taste, ideas and beliefs.

单选题The terrorists might have planted a bomb on a plane in Athens, set to ______ when it arrived in New York.

单选题Many a delegate was in favor of his proposal that a special committee ______ to investigate the incident.A. were set upB. was set upC. be set upD. set up

单选题Many people in Wales have an Uaffinity/U with music.

单选题I don"t understand why people ______ such a beautiful garden with cans and bottles.

单选题Fie suddenly had a great ______ of relief.

单选题The book is ______ to be put into that envelope. You need a bigger one.

单选题Surveys show that ______ less sleep than we think, ______ too much sleep could even harm our health.