英语等级考试pets四级完形填空考试题.doc

英语等级考试pets四级完形填空考试题.doc英语等级考试pets四级完形填空考试题

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　　Man has been storing up useful knowledge about himself and the universe at the rate which has been spiraling upward for 10000 years.

　　The __1_ took a sharp upward leap with the invention of writing,but even __2_ it remained painfully slow for several next great leap forward __3_ knowledge acquisition did not
occur __4_ the invention of movable type in the 15th century by Gutenberg and to 1500,by the most optimistic __6_,Europ was producing books at a rate of 1000 titles per
means that it __7_ a full century to produce a library of 100000 1950,four and a half __8_later,the rate had accelerated so sharply that Europe was producing 120000 ttitles a
once took a century now took only ten 1960,a __10_ decade later,the rate had made another significant jump,__11_ a century's work could be finished in seven and a half ,by
the mid-sixties,the output of books on a world__13_,Europe included,approached the prodigious figure of 900 titles per day.

　　One can __14_ argue that every book is a net gain for the advancement of we find that the accelerative __15_ in book publication does,in fact,crudely __16_ the ra