单选题 Train companies in Tokyo are taking action to reduce the number of people jumping in front of trains. They are fitting blue lights on station platforms to try and create a more calming atmosphere. The East Japan Railway Company has invested almost $170,000 to install the lights in all of the 29 stations on the capital's busy Yamanote Line. There has been an alarming rise in the number of people committing suicide at train stations. A total of 68 people threw themselves under trains in the year up to March. This compares with 42 suicides in the same period a year earlier. In 2008, Japan had nearly 2,000 suicides by jumping in front of a train; around six percent of all suicides nationwide. Suicides have risen sharply in the past decade due to poor economic conditions. No one knows if the blue lights will work. There is no evidence to show that blue light reduces suicidal feelings. Keihan Railway spokesman Osamu Okawa stated: 'We thought we had to do something to save lives. We know there is no scientific proof that blue lights deter suicides, but if blue has a soothing effect on the mind, we want to try it to save lives.' The Associated Press news agency reports on a Japanese therapist called Mizuki Takahashi. She explained her reasons why the blue lights might be a good idea: 'We associate the color with the sky and the sea. It has a calming effect on agitated people, or people obsessed with one particular thing, which in this case is committing suicide,' she said. Other companies are watching this experiment with interest.

单选题 ______ succeed in everything we do.

单选题 Playing table tennis is her______.

单选题 He was in poor health. He could not make his voice ______ .

单选题 When I go out in the daytime I use the bike ______ the car if I can.

单选题Have you ever argued with your loved ones over simple misunderstandings（误解）?Little wonder.We often believe we′re more skillful in getting our point across than we actually are,according to Boza?Keysar

单选题Every year just after Christmas theJanuary Sales start.All the shops reduce their prices and for two weeks,theyare full of people looking for bargains.My husband and I do not normally go tothe sales a

单选题 There is nothing more possible than a new hip or knee that can put the spring back in your step . Patients receiving joint implants (移植)often are able to resume many of the physical activities they love, even those as vigorous as tennis and hiking. No wonder, then, that joint replacement is growing in popularity. In the United States in 2007, surgeons performed about 806,000 hip and knee implants(the joints most commonly replaced),double the number performed a decade earlier. Though these procedures have become routine, they are not failure free. Implants must sometimes be replaced, said Dr. Henrik Malchau, an orthopaedic surgeon (矫形外科医生)at Massachusetts General Hospital in Boston. A study published in 2007 found that 7 percent of hips implanted in Medicare patients had to be replaced within seven and a half years. The percentage may sound low, but the finding suggests that thousands of hip patients eventually require a second operation, said Dr. Malchau. Those patients must endure additional recoveries, often painful, and increased medical expenses. The failure rate should be lower, many experts agree. Sweden, for instance, has a failure rate estimated to be a third of that in the United States. Sweden also has a national joint replacement registry, a database of information from which surgeons can learn how and why certain procedures go wrong. A registry also helps surgeons learn quickly whether a specific type of implant is particularly problematic. 'Every country that has developed a registry has been able to reduce failure rates significantly, 'said Dr. Daniel Berry, chief of orthopedic surgery at the Mayo Clinic in Rochester, Minn. A newly formed American Joint Replacement Registry will begin gathering data from hospitals in the next 12 to 18 months. It's good news for those who are considering replacing a knee or hip.

单选题 The bread and butter ______ served for breakfast.

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单选题 Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ______.

单选题 The unemployment rate in this city ______ from 7% to 6% in the past two years.

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单选题 It is high time we ______.

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单选题Thenumber of speakers of English in Shakespeare′s time is estimated to have beenabout five million.Today it is estimated that some 260 million people speak itas aan21language,mainlyin the United State

单选题 In ______ century, computers will be used more widely.

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单选题 You ______ yesterday if you were really serious about the job.

单选题 Many countries face some serious problems of land use, ______ result from population growth and the demands of modern technological living.