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1、2022年考博英语-宁波大学考前模拟强化练习题（附答案详解）1. 填空题Directions: In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list A-F to fit into each of the numbered blanks. There is one extra choice, which does not fit in any of the blanks. Mark your answers
2、on the ANSWER SHEET. (10 points)(41) After being touted in the early 1990s as “the medicine of the future,” gene therapy left an 18-year-old dead and three others with leukemia; in July it was tied to the death of a 36-year-old Illinois woman undergoing treatment for rheumatoid arthritis, although f
3、urther investigation cleared her therapy of the blame. Gene therapy scientists, however, believe they can put the bad news behind them, thanks to a handful of recent developments and others just over the horizon.(42) Researchers initially planned to treat hereditary disorders such as cystic fibrosis
4、, in which normal gene products are deficient, by delivering functional copies of missing genes to cells that need them. Since then, scientists have expanded gene therapys possible applications to include “training” immune cells to hunt down cancer, building new blood vessels and making the immune s
5、ystem resistant to infection.“We really dont know the full dimension of what it can do,” says Arthur Nienhuis, a hematologist at St. Jude Childrens Research Hospital in Memphis and president of the American Society of Gene Therapy (ASGT). In addition to 12 cancer treatments and a heart treatment cur
6、rently in large phase III clinical trials, there have been a handful of early-stage developments: in June doctors at New YorkPresbyterian Hospital announced promising results from a phase I trial for Parkinsons disease; a therapy that has restored sight to 70 congenitally blind dogs is being tested
7、in humans at the University of Pennsylvania; and eight research groups are gearing up to test new HIV treatments. (43)(44) It can target only those tissues that need it, “which is a major contrast with traditional pharmacotherapy, where you take a pill or receive an injection, and a very, very small
8、 portion of the injected or ingested drug actually arrives at the correct site,” says David Dichek, a cardiologist at the University of Washington. But ensuring that the gene reaches its target is no small feat. Trials can skirt this problem when targeted cells can be injected directly or easily rem
9、oved- with the latter method, doctors can manipulate isolated cells in the lab and replace them in the patient later. But getting genes to inaccessible targets has been one of the fields biggest hurdles.(45) Viruses are good at delivering genetic payloads to cells; after all, that is what they do. I
10、f scientists strip viruses of their genetic material and replace it with therapeutic genes, viruses will deliver this payload to the cells instead. Different viruses do different thingssome attack the liver, others nerves; some insert their DNA into the host genome, others do notso physicians can ch
11、oose those that best suit their purposes and further engineer them if need be. “Theres been a lot of effort to steer viruses to go specific places,” says Donald Kohn, an immunologist at the Keck School of Medicine of the University of Southern California and Children Hospital Los Angeles.A. Even if
12、gene therapy conquers these challenges, will it ever overcome its negative reputation?B. What makes gene therapy so promising also makes it extremely challenging.C. Most scientists use modified viruses as “vectors” to deliver gene therapy.D. Although no gene therapies have yet been approved by the U
13、.S. Food and Drug Administration, more than 800 trials are ongoing; China has approved two cancer treatments, but their efficacy remains unclear.E. The past 15 years have been a roller coaster for gene therapy.F. Gene therapy describes any treatment in which doctors insert new or modified genes into
14、 a persons cells to treat or prevent disease.【答案】41.E42.F43.D44.B45.C【解析】【选项释义】A. Even if gene therapy conquers these challenges, will it ever overcome its negative reputation? A. 即使基因疗法克服了这些挑战，它能克服它的负面名声吗？B. What makes gene therapy so promising also makes it extremely challenging. B. 基因治疗如此有前途的同时也极
15、具挑战性。C. Most scientists use modified viruses as “vectors” to deliver gene therapy. C. 大多数科学家使用改良病毒作为载体来进行基因治疗。D. Although no gene therapies have yet been approved by the U.S. Food and Drug Administration, more than 800 trials are ongoing; China has approved two cancer treatments, but their efficacy
16、remains unclear. D. 尽管美国食品和药物管理局尚未批准基因疗法，但有800多项试验正在进行中；中国已经批准了两种癌症疗法，但疗效尚不清楚。E. The past 15 years have been a roller coaster for gene therapy. E. 过去的15年是基因治疗的过山车。F. Gene therapy describes any treatment in which doctors insert new or modified genes into a persons cells to treat or prevent disease. F. 基因疗法指的是医生将新的或修改过的基因注入人体细胞以治疗或预防疾病的任何一种治疗方法。41.空格处位于句首，推测空格处为段落主旨句。下文中主要提到“基因疗法在20世纪90年代初被吹捧为未来的药物，后来导致一名18岁的人死亡，另有三人患上白血病
