1、 練習（一） In the far corner of the front yard of a large house in Florida _1_(rest) an RV Recreational Vehicle (活動房屋式旅游車)，shaded by trees as clothing on a nearby line sways_2_the breeze. In this RV, National Geographic explorer Thomas Culhane lives with his wife, Ena, almost _3_(entire) off the grid a

2、lifestyle without relying on electricity supply.Culhane began living off the grid in the late 1990s, _4_ he went into the basement of his apartment building in Los Angeles and pulled the plug _5_delivered electricity. Even earlier though, he was first _6_(inspire) by sustainable living during _7_tri

3、p in 1970 to visit his relatives. He was eight years old and worried that his stay in their small village was going to be miserable _8_ his relatives told him they had no air conditioning or electricity but they had plenty of fresh fruits from orchards (果園) _9_ lots of cold drinks chilled by the icy

4、 stream from the ice caps of the nearby mountain. “This is _10_(amaze)，” says Culhane.答案 1.rests 2.in 3. entirely 4. when 5. that 6.inspired 7. a8. because 9.and 10. amazing 練習（二） He met Ena _1_ she was living in an ecovillage in Portugal. Ena said she liked the feeling of _2_(be) low impact, of bei

5、ng virtually harmless to the earth. Culhane was impressed and fell in love with her. The couple got married, _3_(live) on the same property that they currently have. They moved into their first home together an RV _4_ they promptly took completely off grid.Inside their RV, Culhane and Ena have hot s

6、howers, a working gas stove, _5_refrigerator, a washing machine and a big screen TV. They use gas _6_（create） by their onsite biodigesters (生物煮解器) to cook on a gas-powered stove. They also use energy created by the biodigesters _7_(heat) their bath water. They feed the biodigesters using their own f

7、ood waste at no additional cost to the earth.Sometimes on weekends, the RV is turned _8_ a classroom. The couple host workshops to let the community members and students know living an off grid life is getting _9_ (easy) and teach them how to respect and coexist _10_（peaceful） with the environment.答

8、案 1.when 2. being 3. living 4. which 5.a 6.created 7.to heat 8. into 9. easier 10. peacefully 練習（三）The Mandarin (普通話)speaking figure spins around _1_ 360degree restaurant scene in an artificial intelligence driven instruction program _2_ looks like a giant video game. Rensselaer Polytechnic Institut

9、e students testing the technology move inside the 12foothigh projection (投影) to order virtual bean curd _3_ the panda waiter, chat with Beijing market sellers and practice Tai chi by mirroring moves of a watchful teacher.“_4_（definite） less anxiety than messing _5_ up with a real human being，” says

10、Rahul Divakar, a computer science graduate student. “So compared _6_ that anxiety, this is a lot easier.”The Mandarin Project is a joint enterprise of RPI and IBM. Cognitive and Immersive Systems Laboratory researchers are developing a sort of smart room _7_ can understand students words, answer the

11、ir questions _8_ observe their gestures. Lessons are presented as games _9_ tasks, like _10_(order) a meal.答案 1.a2. that 3. from 4. definitely 5.it 6.to 7. that 8.and 9. or 10. ordering 練習（四） “Our plan is _1_(complete) several scenes of real life in China, to let the student be able to have a virtua

12、l trip over there，” says Hui Su, director of the lab at RPI.Tests on the room with students _2_（study）Mandarin will continue this school year _3_they work on additional scenes, including an airport. A six -week course is being readied _4_the summer.The Mandarin Project is _5_ for its scale and compl

13、exity. Computers interpret speech and gesture to keep a dialogue _6_(go). When a student points _7_ a picture and asks “Whats that？” computers can come up with an answer. Still, language teachers need not _8_（fear） for their jobs just yet. Developers of the Mandarin Project say it isnt advanced enou

14、gh right now to completely replace classroom instruction.RPI president Shirley Ann Jackson foresees _9_same type of technology being applied to other spaces, such as corporate boardrooms. “Were not at the end of the line，” Jackson says, “but _10_(close) to the beginning.”答案 1. to complete 2. studyin

15、g 3.as 4.for 5. notable 6.going 7.to 8. fear 9.the 10. 練習（五） The next time you make yourself a hot cup of tea or coffee, you might want to let _1_ cool down a bit before drinking. Researchers say letting your hot drinks cool off could help you _2_ (avoid)some kinds of cancer._3_ fact, the United Nat

16、ions cancer research agency decides to list hot drinks with lead, gasoline and exhaust fumes as “possibly carcinogenic (致癌的)”. In other _4_(word), each one could cause cancer.Researchers at the International Agency for Research on Cancer found evidence _5_ drinks at temperatures above 65 degrees Cel

17、sius, _6_ swallowed, can cause cancer of the esophagus (食道)The researchers examined findings from other studies _7_ tea and coffee were often served at 70 degrees Celsius or above. Those studies were completed in China and South America. In _8_(develop) countries, health experts have linked esophage

18、al cancer _9_ smoking and alcoholic drinks.However, this form of cancer is _10_(common) in areas where people have drinks at very high temperatures.答案 1.it 2. avoid 3. In 4. words 5. that 6.when 7. where 8. developed 9.to 10. more common 練習（六） In Europe and the United States, many people drink coffee and tea _1_temperatures around 60 degrees Celsius. _2_they often add milk _3_ lowers the temperature considerably. However, tea drinkers in South America often enjoy their beverages at _4_(close) to 7