武威六中2018-2019学年度第二学期第三次学段考试高二英语试卷注意事项：1答第I卷考生务必将自己的姓名、准考证号填写在答题卡上。2选出每小题答案前，用2B铅笔把答题卡上对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号框，不能答在本试卷上，否则无效。第卷第一部分 阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。AMetro Pocket GuideMetrorail (地铁)Each passenger needs a farecard to enter and go out. Up to two children under age five may travel free with a paying customer. Farecard machines are in every station. Bring small bills because there are no change machines in the stations and farecard machines only provide up to 5 in change. Get one day of unlimited Metrorail rides with a One Day Pass. Buy it from a farecard machine in Metro stations. Use it after 9: 30 a. m. until closing on weekdays, and all day on weekends and holidays.Hours of serviceOpen: 5 a. m. Mon. Fri.7 a. m. Sat. Sun. Close: midnight Sun. Thurs.3 a. m. Fri. Sat. nightsLast train times vary. To avoid missing the last train, please check the last train times posted in stations.MetrobusWhen paying with exact change, the fare is 1. 35. When paying with a SmarTrip-card, the fare is 1.25.Fares for senior/disabled customersSenior citizens 65 and older and disabled customers may ride for half the regular fare. On Metrorail and Metrobus, use a senior/disabled farecard or SmarTrip-card. For more information about buying senior/disabled farecards, SmarTrip-cards and passes, please visit MetroOpensDoors.com or call 202-637-7000 and 202-637-8000. Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorail services by calling 202-962-1100.Travel tips（提示）Avoid riding during weekday rush periodsbefore 9: 30 a. m. and between 4 and 6 p. m. If you lose something on a bus or train or in a station, please call Lost & Found at 202-962-1195.1. What should you know about farecard machines? A. They start selling tickets at 9: 30 a. m. B. They are connected to change machines.C. They offer special service to the elderly. D. They make change for no more than 5.2. At what time does Metrorail stop service on Saturday? A. At midnight. B. At 3 a. m.C. At 5 a. m. D. At 7 p. m.3. What is good about a SmarTrip-card? A. It is convenient for old people.B. It saves money for its users.C. It can be bought at any time.D. It is sold on the Internet.4. Which number should you call if you lose something on the Metro? A. 202-962-1195B. 202-962-1100C. 202-637-7000D. 202-637-8000BThe African elephant, the largest land animal remaining on earth, is of great importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna(大草原)surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat. It is the elephants great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters. Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well. What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.5.What is the passage mainly about?A.Disappearance of African elephants.B.Forests and savannas as habitats for African elephants.C.The effect of African elephants search for food.D.The eating habit of African elephants.6.What does the underlined phrase “setting the terms” most probably mean?A.Fixing the time. B.Worsening the state.C.Improving the quality. D.Deciding the conditions.7.What do we know about the open spaces in the passage?A.They result from the destruction of rain forests.B.They provide food mainly for African elephants.C.They are home to many endangered animals.D.They are attractive to plant-eating animals of different kinds.8.The passage is developed mainly by _.A.showing the effect and then explaining the causesB.pointing