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完形填空Electronic books have changed the way many people read for1. Now online textbooks are changing the way some students learn and some teachers teach.More than2students go to the public schools in Fairfax County, Virginia, outside Washington. Last year, the school system used digital books in fifteen schools. This school year, middle schools and high schools changed3printed to electronic textbooks in their social studies classes.“I mean, it’s just 4a regular textbook, except it’s got it all online.” says Luke Rosa, a history teacher at Falls Church High School.Peter Noonan, an assistant superintendent(主管) of schools says, “The world’s changing5. And the online textbooks can change right along with the events that6.”“Digital books also cost7than printed textbooks,” he says, “Usually it’s between fifty and seventy dollars 8a textbook for each student, which adds up to about eight million dollars for all of our students in Fairfax County. In fact, we have bought all of the online textbooks for our students for just under six million dollars.”Social studies teacher Michael Bambara says the e-book he uses in his government class is better than a(an)9textbook. It has materials for students10different levels of reading skills…1.A.pleasedB.pleasingC.pleasantD.pleasure2.A.one hundred seventy-five thousandB.one hundred seventy-five thousandsC.one hundred and seventy-five thousandD.one hundred and seventy-five thousands3.A.intoB.fromC.withD.along4.A.likeB.likingC.likedD.likely5.A.at timesB.at all timesC.at that timeD.at the same time6.A.is happenedB.is happeningC.are happeningD.have been happened7.A.more expensiveB.cheaperC.moreD.less8.A.buyB.buyingC.to buyD.bought9.A.onlineB.printedC.digitalD.electronic10.A.withB.haveC.who hasD.they have