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29.Which of the following can replace the underlined word "sophisticated"in paragraph 3?A.Unimportant.B.Permanent.C.Complicated.D.Imaginary.30.Why is playful wresting mentioned in the text?A.To indicate that hide-and-seek is much easier.B.To indicate that hide-and-seek is more fascinating.C.To indicate that hide-and-seek is more adventurous.D.To indicate that hide-and-seek is more challenging.31.What can we learn from the text?A.Evolution brings the rats the ability to play.B.Rats are born with the ability to play sociallyC.Hide-and-seek helps rats improve their social abilityD.Adult rats tend to play more often than young ones.D阁People have different ways of dealing with a common cold.Some take over-the-counter(非处方的)medicines such as aspirin while others try popular home remedies(治疗)likeherbal tea or chicken soup.Yet,here is the tough truth about the common cold:nothingreally cures you of it.So why do people sometimes believe that their remedies work?According to James如Taylor,professor at the University of Washington,colds usually go away on their own in昂about a week,improving a little each day after symptoms peak,so it's easy to believe it'smedicine rather than time that deserves the credit.It still seems hard to believe that we can deal with more serious diseases yet we arepowerless against something so common as a cold.Recently,scientists came closer to figuringout why.To understand it,you first need to know how antiviral(抗病毒的)drugs work.They attack the virus by attaching to and changing the surface structures of the virus.To dothat,the drug must fit and lock into the virus like the right piece of a jigsaw(),whichmeans scientists have to identify the virus and build a 3D model to study its surface before they蚁can design an antiviral drug that is effective enough.The two cold viruses that scientists had long known about were rhinovirus()Aand B.But they didn't find out about the existence of a third virus,rhinovirus C until 2006.闻All three of them contribute to the common cold,but drugs that work well against rhinovirusA and B have little effect when used against rhinovirus C.阳"This explains most of the previous failures of drug trials against rhinoviruses,"studyleader Professor Ann C.Palmenberg at the University of Wiscons in Madison,US,toldScience Daily.Now,more than 10 years after the discovery of rhinovirus C,scientists have finally builta highly detailed 3D model of the virus,showing that the surface of the virus is,as expected,different from that of other cold viruses.With the model in hand,hopefully a real cure for a common cold is on its way.Soon,wemay no longer have to waste our money on medicines that don't really work.32.Which of the following is NOT the way people usually deal with a common cold?部A.Eating chicken soup.B.Taking aspirin.C.Taking exercise.D.Drinking herbal tea.33.What are antiviral drugs supposed to do?A.To fit and lock into the cold virus.B.To exactly copy the cold viruses.C.To prevent colds from developing into serious diseases.D.To absorb different kinds of cold viruses at the same time.【高二11月份期中检测·英语第5页（共8页）】
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