Passage 1Lonely people, it seems, are at greater risk than the gregarious of developing illnessesassociated with chronic inflammation, such as heart disease and certain cancers. A paper publishedlast year in the Public Library of Science, Medicine, shows the effect on mortality of loneliness iscomparable with that of smoking and drinking after examining the results of 148 previous studiesand controlled for factors such as age and pre-existing illness.Steven Cole of the University of California, Los Angeles, thinks he may know why this is so.He told the American Association for the Advancement of Science meeting in Washington, D.C.,about his work studying the expression of genes in lonely people. Dr. Cole harvested samples ofwhite blood cells from both lonely and gregarious people. He then analysed the activity of theirgenes, as measured by the production of a substance called messenger RN
A. This molecule carriesinstructions from the genes telling a cell which proteins to make. The level of messenger RNA frommost genes was the same in both types of people. There were several dozen genes, however, thatwere less active in the lonely, and several dozen others that were more active. Moreover, both theless active and the more active gene types came from a small number of functional groups.Broadly speaking, the genes less active in the lonely were those involved in staving off viralinfections. Those that were more active were involved in protecting against bacteria. Dr. Colesuspects this could help explain not only why the lonely are iller, but how, in evolutionary terms, thisodd state of affairs has come about.The crucial bit of the puzzle is that viruses have to be caught from another infected individualand they are usually species-specific. Bacteria, in contrast, often just lurk in the environment, andmay thrive on many hosts. The gregarious are therefore at greater risk than the lonely of catchingviruses, and Dr. Cole thus suggests that past evolution has created a mechanism which causes whitecells to respond appropriately. Conversely, the lonely are better off ramping up their protectionagainst bacterial infection, which is a bigger relative risk to them.What Dr. Cole seems to have revealed, then, is a mechanism by which social environmentreaches inside a person′ s body and tweaks its genome so that it responds appropriately. It is not thatthe lonely and the gregarious are genetically different from each other. Rather, their genes areregulated differently, according to how sociable an individual is. Dr. Cole thinks this regulation ispart of a wider mechanism that tunes individuals to the circumstances they find themselves in.What can we know about viruses and bacteria from the fourth paragraph
A.Viruses often remain hidden in the environment.B.Bacteria are passed to other people by the infected individual.C.The lonely people can catch viruses more easily.D.Viruses pose a greater threat to the gregarious than bacteria.

Passage 1Lonely people, it seems, are at greater risk than the gregarious of developing illnessesassociated with chronic inflammation, such as heart disease and certain cancers. A paper publishedlast year in the Public Library of Science, Medicine, shows the effect on mortality of loneliness iscomparable with that of smoking and drinking after examining the results of 148 previous studiesand controlled for factors such as age and pre-existing illness.Steven Cole of the University of California, Los Angeles, thinks he may know why this is so.He told the American Association for the Advancement of Science meeting in Washington, D.C.,about his work studying the expression of genes in lonely people. Dr. Cole harvested samples ofwhite blood cells from both lonely and gregarious people. He then analysed the activity of theirgenes, as measured by the production of a substance called messenger RN
A. This molecule carriesinstructions from the genes telling a cell which proteins to make. The level of messenger RNA frommost genes was the same in both types of people. There were several dozen genes, however, thatwere less active in the lonely, and several dozen others that were more active. Moreover, both theless active and the more active gene types came from a small number of functional groups.Broadly speaking, the genes less active in the lonely were those involved in staving off viralinfections. Those that were more active were involved in protecting against bacteria. Dr. Colesuspects this could help explain not only why the lonely are iller, but how, in evolutionary terms, thisodd state of affairs has come about.The crucial bit of the puzzle is that viruses have to be caught from another infected individualand they are usually species-specific. Bacteria, in contrast, often just lurk in the environment, andmay thrive on many hosts. The gregarious are therefore at greater risk than the lonely of catchingviruses, and Dr. Cole thus suggests that past evolution has created a mechanism which causes whitecells to respond appropriately. Conversely, the lonely are better off ramping up their protectionagainst bacterial infection, which is a bigger relative risk to them.What Dr. Cole seems to have revealed, then, is a mechanism by which social environmentreaches inside a person′ s body and tweaks its genome so that it responds appropriately. It is not thatthe lonely and the gregarious are genetically different from each other. Rather, their genes areregulated differently, according to how sociable an individual is. Dr. Cole thinks this regulation ispart of a wider mechanism that tunes individuals to the circumstances they find themselves in.What message does Dr. Cole seem to convey by the mechanism
A.The lonely people differ in genes from the gregarious people.B.Sociability can adjust a person' s genome and make it work properly,C.The lonely people can become sociable if they regulate their genes.D.Individuals have to find their own ways to adapt to the environment.

听力技能是语言技能的重要内容之一。请简述听力基本技能包括哪些内容，并选择其中的三项技能．列举出合理的训练方式。

以下片段选自某节英语课堂教学实录，阅读并回答问题。T: ... You all have finished the writing about how to protect our environment, right Ok,now, it′s time to check in terms of the grammar, punctuation point and spelling.S: (checking time)T: Ok, now, who would like to share your papersAnna: ... We shouldn′ t throw rubbish everywhere ...T: Your ideas are a little shallow, and the organization is a little disordered.根据上面的教学片段回答下面三个问题：(1)该片段呈现的是英语教学的什么课型它属于该课型的哪个阶段(2)这节课的教学重难点是什么(3)分析该教师在这一阶段存在的主要问题，并提出相应的改进建议。

Which of the following words has the proper word stress
A.e'conomicB.'machinery,C.chimpan'zeeD.'precarious

Which of the following statements is NOT a way of consolidating vocabulary
A.Defining.B.Matching.C.Gap-filling.D.Labeling.