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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:611

Up to Tuesday's attack, the worst school shooting in the U.S.was in March 1998 in Jonesboro, two boys, aged 11 and 13, shot and killed a teacher and four girls.

A.while B.where C.when D.then
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UptoTuesdaysattack,theworstsch