One【2018届北京市东城区高三英语一模试题】第二部分：阅读理解（共两节，40分）第一节（共15小题；每小题2分，共30分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

DThe cruise（邮轮）tourism is the fastest growing industry in the travel industry. With rapid growth in the number of passengers, the number of cruise ships at sea, and the increased variety of destinations, the fast growth in the industry follows with increasing influences on the environment.Like many travel industries, the negative influences on the environment seem to outweigh the positive ones. Even though the cruise industry is relatively small compared to the airline industry, cruise ships and their passengers generate more waste and pollutant emissions（排放物）while travelling and docked in port. According to the United States Environmental Protection Agency, a one-week voyage generates more than 50 tons of garbage, and during that same week 3.78 million litres of waste water is produced. That is water which is harmful to the ocean life and cannot be poured back into the ocean without being treated. These numbers are multiplied by more than 200 cruise ships sailing the world 365 days a year.Due to pollution, coral reefs（珊瑚礁）are taking a significant damage. There are 109 countries with coral reefs. In 90 of them, reefs are being damaged by cruise ships. It is said 70% of cruise destinations are in the spots with the existence of a wide variety of sea plants and animal species.However, it is not the amount of pollution generated by cruise ships that is most concerned,but rather, the way cruise ships deal with their waste. The way cruise ships get rid of waste is highly unregulated. Waste can be poured a few short miles off shore, which is later brought backto shore due to ocean currents. In most cases, there was no monitoring or administration from local authorities if cruise ships violated the pollution standards. The cruise industry continues to promote itself as environmentally friendly; the truth is, there are many examples of cruise ships breaking the law.Processing waste on board is not impossible for cruise industries. Since the increased harmful effects on the environment have come to light, some cruise industries have done their part and astechnology increases, their ability to become more eco-friendly has become the most important.Holland American Line has invested $1.5 million into a program called Seawater Scrubber Pilot. This program looks for opportunities to reduce engine emission on its ships. The Sea Water Scrubber system uses the natural chemistry of seawater to remove all harmful materials in the seawater before it is poured overboard. Even though it is only a small step, it makes a big difference.The environmental impact of the cruise industry on the destination has negative effects. However, with effort made, there is still hope that these effects can be limited, or as we wish, reduced.47. What adds to cruise ships’ pollution?A. Lack of proper regulations.B. Growing size of cruise ships.C. Service system on cruise ships.D. Useless water-treating program.48. Why did the author mention Holland American Line?A. To stress environmental protection matters.B. To evaluate the effects of natural chemistry.C. To introduce the Sea Water Scrubber system.D. To prove some anti-pollution measure works.49. What is the passage mainly about?A. Influences of cruise tourism.B. Problems in tourist industry.C. Consequence of ocean pollution.D. Administration of cruise emissions.50. How is the passage developed?A. By analyzing cause and effect.B. By discussing problems and solutions.C. By comparing benefits and disadvantages.D. By presenting similarities and differences.Keys: 47-50 ADABTwo【2018届北京市东城区高三英语二模试题】第二部分：阅读理解（共两节，40分）第一节（共15小题；每小题2分，共30分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

DEarth is experiencing its sixth mass extinction: somewhere between 30 and 159 species （物种）disappear every day, and more than 300 types of animals have died out since 1500. This is not good for the future of life on our planet, but what if we could make some of the extinct species come back to life? Thanks to ongoing advances in DNA recovery and cloning technology, de-extinction may soon be realized, and we may see Tasmanian Tigers, or Dodo Birds back into existence in the near future.Some scientists are confident and optimistic about de-extinction. They think that the best reasons for de-extinction have more to do with ecology than tourism. “If this is always going to be a zoo animal, then stop,” says Ben Novak, the lead researcher at Revive & Restore-a foundation devoted to rescuing endangered and extinct species in San Francisco, California. “The goals have to be about ecological restoration and function.”Take passenger pigeons for example. Their numbers reached nearly 5 billion at the start ofthe 19th century, and they played an important role in shaping the forests they inhabited(居住). After their extinction, the forests have never been the same. “The passenger pigeon is a very important ecological species if we want their original habitat back,” Novak says.However, we need to think twice about Novak's idea. Any new scientific initiative is boundto have risks, so is de-extinction. Although some assume that de-extinction may help the environment, we can’t be so sure. The de-extinct animals would now be strangers to their habitats. As the habitat is no longer what it was, the species role within the ecosystem may have also changed. This could be actually a threat to the other species within the environment as the de-extinct animals enter the area and compete for food sources. Once again we’re trying to force nature to act in a certain way, rather than letting it remain natural.Many scientists also believe that priorities (优先权) would change within the conservation of currently endangered species. Would we still put in the effort to preserve living animals if weknew we could just magically bring them back from-the dead? Douglas McCauley, an ecologist at University of California, Santa Barbara, stresses this worry. “Honestly, the thing that scares me most is that the public absorbs the misimpression that extinction is no longer scary. The generalattitude becomes: Deforest, no worry, we can reforest. If we drive something extinct, no worry, we can de-extinct it.”said McCauley.It seems that with the subject of de-extinction, we must look at our reasons for doing such a thing. Yes, we may, in the near future, be able to de-extinct the extinct species. But does that mean we should? Are the risks really worth it? Does it make sense to focus on the dead than the living? And who are we truly benefiting in the end?47. Ben Novak probably agrees thatA. the value of de-extinction lies in tourismB. de-extinct animals are unfit to live in the zooC. de-extinction results fr om the change of ecosystemD. de-extinction aims to bring back former environment48. What is mainly talked about in Paragraph 5?A. People's impressions on lost species.B. Change of public attitudes towards de-extinction.C. Importance of the conservation of living animals.D. Effects of de-extinction on the protection of endangered species.49. What is the author's attitude toward de-extinction?A. Optimistic. C. Neutral.B. Doubtful. D. Supportive.50. Which of the following shows the structure of the passage?I:Introduction P:Point Sp: Sub-point(次要点) C:ConclusionKeys: 47-50 DDBAThree【2018届北京市西城区高三英语一模试题】第二部分：阅读理解（共两节，40分）第一节（共15小题；每小题2分，共30分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。