ox.Withthefounding(成立)ofthePeople'sRepublicofChina,militaryrucksacks(军用帆布包)becamepopular.Manypeoplecarriedthemwhentheywereinschool.Askyourgrandparentsorparentsaboutthesebags.Maybetheycantellyouabouttheirexperiencesofcarryingthemwhentheywereinschool.Anewstyleofschoolbagshasappearedinrecentyears.Manyofthemhavecolorfulandfashionabledesigns(时尚的设计)onthem,suchaspicturesofcartoonsorpopstars.fortabletouse.Somestudentspullwheeledbagsfilledwithheavytextbooksandotherscarrybackpacks.Schoolbagsarestillchanging.Canyouimaginewhatfutureschoolbagswillbelike?56.SchoolbagsintheHanDynastyweremadeof_______.A.clothB.paperC.plasticD.bamboo57.ordingtothepassage?A.Militaryrucksackswerepopularinthe1950s.B.Thebudaiwasheavierthanthebamboobox.C.Therearesomepicturesonthenewstyleofschoolbags.D.Schoolbagshavechangedalot.
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