I've made new friends and am ____ at college. I think I'm enjoying being a college student.A. doing businessB. doing wrongC. doing harmD. doing well

As part of the cybersecurity protocol, it is-------- for all employees to undergo regular training sessions to enhance their understanding of potential online threats.A. compulsoryB. burdensomeC. pointlessD. naive

Instead of going to school, this disabled man taught himself ___ to college level.A. for a whileB. all the wayC. step by stepD. in time

Some people ______ their happiness to living a simple life and spending time with loved ones.A. dedicateB. attributeC. commitD. expect

13. With all the social media platforms out there, people could get involved in online ____ and chats they are interested in.A. peaksB. shellsC. miraclesD. forums

Complete the sentences with the expressions below Change the from where necessary. add up；fill out；take place；slow down；take sth.for granted （1）Adjust your reading speed as you read； ____ when you want to make sure that you understand a section of the material.（2）To join the reading club，you only need to ____ the application form.（3）Learning can ____ everywhere：in a classroom，in a meeting room，or during travel.（4）We generally ____ children's acquisition （习得） of their mother tongue ____ .We never thought about what happened behind.（5）Learn a few new words every day and they will soon ____ .

Despite nutrition experts’ best efforts to educate people about the dangers of a diet filled with processed food, it appears that the world doesn’t want to listen. Medical specialists point out that, although eating too much unhealthy food is likely to be as dangerous in the long term as smoking, regular consumption of high-calorie food has somehow become more socially ________ than ever. While local authorities in some towns and cities have taken measures to fight the rise in this trend by ________ the number of fast food outlets permitted to be open at the same time, critics argue that people have every right to make their own decisions about what they eat and how they choose to live. However, the way in which we have come to eat a lot of takeaways isn’t only a(n) ________ issue of weight gain, or of buying larger clothes. The consequences of mass overconsumption should strike ________ into the hearts of everyone. Research suggests that there is an evolutionary reason as to why people ________ overeat—it is simply part of our inborn behaviour. When humans evolved, we did not have the adequate supply of food that we enjoy today, and so eating was more about ________ than pleasure. We became more likely to choose high-calorie foods, with high fat content, that could ________ us through cold winters when the supply of nourishment became inadequate. This explains why a 600-calorie burger seems so ________ : it makes us feel well fed and inspires contentment. Processed food ________ the reward response in our brains, so we feel obliged to overeat, and not necessarily in a healthy way. Junk food acts as a trigger (触发器) for chemicals such as the ‘feel good’ dopamine to flood through the brain and cause a sensation of happiness. ________ , high amounts of sugar and sodium (one of the chemicals in salt and other ingredients of fast food) cause a huge rise in blood sugar, pushing it to unnatural levels. This occurs within the first few moments of eating a high-calorie meal. From there, routinely processing such high levels of sodium is ________ . The body’s organs are pushed beyond their ________ ability to do so. The kidneys (肾脏) cannot remove all the extra salt from the blood, and thus extra sodium causes the heart to pump faster while transporting blood through the veins (血管). There are multiple dangers of high blood pressure, especially for the elderly and in the long term. Sodium ________ in such quantities can lead to dehydration, a condition whose symptoms are extremely similar to hunger, and this leads to a painful truth: as soon as you have finished your junk food meal, you immediately start to ________ another. Thereafter, the body starts to digest the food. Usually, this takes between 4 and 12 hours, but with fast food, where the fat content is so much higher, the same ________ lasts at least three days. 【小题1】 A．worthwhile B．acceptable C．relevant D．responsible 【小题2】 A．declaring B．estimating C．increasing D．limiting 【小题3】 A．alternative B．meaningless C．collective D．personal 【小题4】 A．boredom B．relief C．fear D．satisfaction 【小题5】 A．compulsively B．reluctantly C．defensively D．objectively 【小题6】 A．appetite B．evolution C．survival D．fighting 【小题7】 A．sustain B．please C．guide D．supply 【小题8】 A．tremendous B．surprising C．attractive D．expensive 【小题9】 A．stimulates B．guarantees C．produces D．illustrates 【小题10】 A．Predictably B．Therefore C．Comparatively D．Meanwhile 【小题11】 A．inevitable B．impossible C．significant D．powerful 【小题12】 A．natural B．superior C．minimum D．learned 【小题13】 A．turned up B．passed down C．looked over D．taken in 【小题14】 A．offer B．prepare C．desire D．share 【小题15】 A．symptom B．process C．damage D．hunger

单选题（共25题，50.0分）题型说明：Choose the best answers from the four choices marked by A,B,C and D2. (2.0分) No one should enter the spot without the____of the police.A. permitB. permissionC. permittingD. permittence

Directions:This is an incomplete sentence and four choices marked A, B, C andA. Choose the best one of them to complete the sentence.From my ____, technology has made students less creative than they were in the past.B. mindC. opinionD. perspectiveE. view

For decades, public health officials have puzzled over a surprising fact about HIV: only about 10-20 percent of infants who are breastfed by infected mothers catch the virus. Tests show, though, that HIV is indeed present in breast milk, so these children are exposed to the virus multiple times daily for the first several months of their lives.Now, a group of scientists and doctors from Duke University have figured out why these babies don’t get infected. Human breast milk naturally contains a protein called Tenascin C that neutralizes HIV and, in most cases, prevents it from being passed from mother to child. Eventually, they say, the protein could potentially be valuable as an HIV-fighting tool for both infants and adults that are either HIV-positive or at risk of contracting the infection.The research, published in Proceedings of the National Academy of Sciences, was inspired by previous work done by other researchers showing that, both in tissue cultures(组织培养) and live mice, breast milk from HIV-negative mothers was naturally endowed with HIV-fighting properties. Scientists suggested that a few different proteins in the milk could potentially be responsible, but no one knew which one.As part of the study, the researchers divided breast milk into smaller fractions(部分) made up of specific proteins via a number of filters(过滤器) — separating the proteins by size, electrical charge and other characteristics — and tested which of these fractions, when added to a tissue culture, prevented the cells from being infected by HIV. Eventually, they found that one particular protein was present in all the HIV-resistant fractions but in none of the others: Tenascin CTenascin C works by blocking a key protein on HIV’s envelope that normally ties up to a receptor on a T cell’s membrane called CCR5. In doing so, Tenascin C prevents HIV from mixing with the T cell and injecting its RNA inside.Still, the researchers say that other natural elements in milk might play a role in fighting HIV as well. "It’s clearly not the whole story, because we do have samples that have low amounts of this protein but still have HIV-neutralizing activity," the study’s lead author Permar says. "So it may be acting in concert with other antiviral and antimicrobial factors in the milk."Whatever those other factors are, though, the finding vindicates (证明) recent changes to UN guidelines that recommend even HIV-positive mothers in resource-poor countries should breastfeed, if they’re taking anti-retroviral drugs to combat their own infection.The next steps, Permar says, are determining which area of Tenascin C is active and whether it can effectively prevent transmission in a live animal. If it works, it could potentially be incorporated(并入) into an HIV drug with broader applications. It’s even possible that it could someday be adapted to reduce the risk of HIV transmission in adults as well as infants.1.What can we know about Permar and the research group according to the passage?A.They have found a cure for HIVB.They have helped change UN guidelinesC.They will do more researches on Tenascin CD.Their finding is based on their previous work2.What is the main idea of Paragraph 1?A.The breast milk from an infected mother doesn’t contain HIV at allB.Only a small percentage of infants breastfed by infected mothers catches HIVC.The possibilities of infants catching HIV have nothing to do with infected mothersD.Children feeding on infected mothers’ milk won’t catch HIV though exposed to it often3.Why did the researchers divide breast milk into smaller fractions?A.To find out Tenascin CB.To make up specific proteinsC.To add them to a tissue cultureD.To test what prevents cells from being infected4.Which of the following about Tenascin C is true?A.It has become an effective tool in fighting HIVB.It is the key protein on HIV’s envelopeC.It can prevent transmission in a live animal effectivelyD.It helps prevent mother-to-child transmission of HIV