文档介绍：Part5SkimmingandScanning(MultipleChoice+BlankFilling)(每小题:1分)Directions:-7,choosethebestanswerfromthefourchoicesmarkedA,B,-,?Orareotherchangesneededtoprotectstudents?,Colorado,noamountofredecorationcanwipeawaythebittermemoryoftheshootingthattook15livesthereonApril20,,presidentoftheNationalSchoolSafetyCouncil,"Littletonchangedthelandscape,",politicians,schooladministrators,parents,?AlthoughthestoriesfromLittletonandotherschoolshavebeenhorrifying,,therewere164crimesforevery1,,thenumberhaddroppedto128per1,,accor