全国各地接二连三地发生了多起特大安全事故，造成严重的人员伤亡，特别是北京密云、吉林商厦等特大安全事故，引起了党中央和国务院的高度关注Unit 1 Art单元加餐练（一-二）单元加餐练（一） 完形阅读组合练加餐练(一)完形阅读组合练.完形填空It was one day in March 2008. I made a surprise _1_ to my friends: I would shut down my law practice and attempt to travel around the _2_ in about a year. Whats more, Id do it without taking any _3_ or making a single advance reservation (预定) of any kind.Once I had said the words, there was no _4_. It took months to shut down my law practice and get things in order. _5_， I set off on my adventure in December 2008. I _6_ traveling without using planes wasnt _7_. Trying to circle the world in sixteen _8_ made it tougher.I took three overnight buses to travel 3,000km through Argentina, from Ushuaia to the capital Buenos Aires. I would _9_ the windows for hours at the completely unspoiled plains, as if humans had never _10_ it. It took seven days and nights on trains to get from Moscow to Beijing. Later in my _11_， it took 22 days on a ship to get from New Zealand through the Panama Canal and back to Philadelphia in April 2010 to _12_ my aroundtheworld adventure.I had to work for my passage, as it was really one of the most _13_ parts of my journey. These _14_ generally cost between 120 and 140 euros per day on board.It _15_ that traveling with no reservations was far less difficult than Id _16_. Pulling into a city on a bus with a backpack, looking into a _17_ for suggestions on how to find a place to stay, and then finding an empty _18_ were never much of a problem anywhere. _19_， making no advance reservations also kept me flexible (灵活的) and open about all my travel plans. So thats the _20_ I give everyone.语篇解读：作者放弃律师工作而去周游世界。途中，他不坐飞机，也不提前做任何预订，历时16个月，终于结束了他的环球旅行。1A.discovery BcommentCannouncement Ddifference解析：选C根据第二段开头“Once I had said the words”可推断此处指作者宣布他的计划。2A.globe BbarCcity Dtown解析：选A根据第二段末尾“Trying to circle the world”的提示可知，作者打算去周游世界。3A.ships BbusesCtrains Dflights解析：选D根据下文“_6_ traveling without using planes”可知，作者计划在旅行途中不坐飞机。4A.turning down Bturning backCturning up Dturning off解析：选B作者既然话已说出，就不能打退堂鼓。5A.Finally BImmediatelyCLuckily DSuddenly解析：选A做了几个月的准备以后，作者终于出发了。6A.forgot BensuredCexpected Dfound解析：选D作者发现旅行途中不坐飞机的不容易。7A.boring BeasyChard Dexciting解析：选B根据“made it tougher”可推断出旅行途中不坐飞机的不容易。8A.days BweeksCmonths Dyears解析：选C由上下文语境可知，作者2008年12月出发，2010年4月返回，历时16个月，故选C项。9A.look out of Blook intoClook around Dlook back解析：选A作者会透过车窗一连几个小时地看着没有被破坏掉的平原。10A.protected BacceptedCdeveloped Dtouched解析：选D根据上文“the completely unspoiled plains”可知，作者觉得人类好像从来没有踏上过这些平原似的。11A.life BjourneyCprocess Dstudy解析：选B此处指作者的环球旅行，故选B项。12A.celebrate BshortenCfinish Dstart解析：选C根据“back to Philadelphia”可知，其环球旅行结束。13A.expensive BterribleCuncomfortable Dchallenging解析：选A根据“cost between 120 and 140 euros per day on board”可推断出这次旅行之昂贵。14A.products BticketsCtrips Dhotels解析：选C此空指上一段作者提到的旅程，故选C项。15A.worked out Bput outCmade out Dturned out解析：选D作者原来想象不做任何预订可能会很难，结果其实也没有那样难，根据语境可判断选D项。16A.doubted BimaginedCbelieved Dplanned解析：选B参见上题。17A.guidebook BnewspaperCmagazine Dtextbook解析：选A根据生活常识可知，旅行途中可以借助旅游指南来寻找住的地方。18A.space BhallCstreet Droom解析：选D根据上文可知，找到空房间根本不是问题。19A.Therefore BBesidesCHowever DOtherwise解析：选B此处进一步介绍旅行途中不提前做任何预订的好处，表示递进，故选B项。20A.conclusion BtruthCadvice Ddecision解析：选C旅行途中不提前做任何预订给作者带来很多好处，因此作者也给别人同样的建议。.阅读理解People all over the world love listening to music and most have their favourite songs which they listen to again and again. But how did it all start? When could people first choose the music they wanted to listen to?The 1900s: The player radioIn the late 19th and early 20th centuries, pianos became very popular and rich families bought “player pianos”. A player piano played music that was programmed on paper rolls with holes in them and you could also play it like a “normal” piano. In the mid 1920s player pianos began to disappear mainly because the radio got more popular.The 1910s: The first phonographs (留声机)As early as 1877, there were phonographs to play music on and by the 1910s, many families had one. The music was on “records” made of aluminum foil (铝箔). People could listen to them only a few times before the foil broke. Later the music was on wax cylinders (蜡筒). These could hold longer recordings (two to four minutes), and people could play them more often.The 1920s: Gramophones and record playersGramophones were similar to the phonographs, but they used flat vinyl (乙烯基) disks and not cylinders to hold the music. The disks went round, and first a steel needle, then later a small diamond, “took” the music off the record. Some of the disks could play for more than 20 minutes per side. Today some music lovers who are crazy about disks still use vinyl records.The 1960s1970