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    19．Would you like to keep free ebooks handy to read on your phone or tablet？Several websites offer ebooks you can download without spending any money at all．
    Amazon
    Amazon is filled with free ebooks you can download．Amazon's Best Seller list is divided into Paid and Free．Check out the free sections in dozens of genres （种类），each listing the Top 100 free ebooks so you will have a lot of choices．This list changes constantly，based on how well the books are"selling"and whether they become or remain free．
    Over Drive
    Over Drive is an ebook service that works with local libraries to lend free ebooks to readers．It includes a wide collection of ebooks，from new sellers to classics．Sometimes there is a wait for a library ebook，just as there can be for a popular print book．
    Project Gutenberg
    Started in 1971，Project Gutenberg has over 53，000 free ebooks．Project Gutenberg ebooks are available to download in the U．S．but may be restricted in other countries if they are still protected by copyright．
    Apple iBooks
    You can read free ebooks on your iPhone and iPad using the iBooks app．Head to the iTunes App Store and click the"Free Books"category．You can see a list of the top best sellers．Click"Get"to download those books to your iPhone or iPad．
    Audible
    Audible lets you download audio （有声） books．You can get．a free audiobook when you sign up for a membership．Audible is currently available for listeners in the US，the UK，Canada，India，and Australia．
    Finally，when you find a free ebook you want to read，get it right away．Often the offer is open only briefly．If you wait too long，you may discover the book now has a price attached．
     
    21．What is the author's purpose of writing the passage？D
    A．To introduce some new best-selling ebooks．
    B．To show the advantages of some ebook services．
    C．To encourage readers to buy more ebooks online．
    D．To recommend some websites to download free ebooks．
    22．What can we learn from the text？C
    A．The ebooks on Amazon are always free to read．
    B．Library print hooks arc available on Over Drive．
    C．IPhone users can access Apple iBooks via the iBooks app．
    D．Only in die US can Project Gutenberg ebooks be downloaded．
    23．Which is a must if you want to download audio books from Audible？B
    A．Profession．
    B．Registration．
    C．Background．
    D．Birthplace．

    分析 本文是一篇广告布告类阅读，属于广告，本文主要介绍了TrackR的功能，使用方法以及价钱，购买方式，目的是劝说读者购买TrackR．

    解答 21．C．细节理解题．根据It's called TrackR．It is a state-of-the-art tracking device the size of a quarter．It's changing the way we keep track of the important things in our lives．以及上文内容可知，TrackR可以帮你寻找丢失的物品．故选C．
    22．B．细节理解题．根据It's easy!Install the free TrackR app on your smartphone，connect the app to your device and you're ready to go!Simply attach TrackR to whatever you want to keep track of．可知，TrackR可以通过手机应用在线使用．故选B．
    23．D．推理判断题．根据文章内容可知，本文主要介绍了TrackR的功能，使用方法以及价钱，购买方式，目的是劝说读者购买TrackR．故选D．

    点评 本文是一篇广告布告类阅读，题目涉及多道主旨大意题，细节理解题，推理判断题．做题时学生应仔细阅读原文，把握文章主要内容，联系文章上下文内容并结合所给选项含义，从中选出正确答案，一定要做到有理有据，切忌胡乱猜测．

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    B．believed that sports were less important than studies
    C．helped start the modern Olympic Games
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    C．field sports
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    B．The torch is carried from runner to runner through many countries．
    C．Runners who carry the torch can be men or women．
    D．The Olympic Games don't begin until the basin of oil catches fire．

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