22. (单选题) 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.( )(本题3.0分) A、 while B、 where C、 when D、 then

22. (单选题) 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.( )(本题3.0分)
A、 while
B、 where
C、 when
D、 then

出自：赤峰学院- 综合英语II(专升本)

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