―What’s the matter? You look worried and restless. ―Oh, nothing really serious. As a matter of fact, I ______ of my graduation thesis. I have to hand it in soon.
—Why ! Where's my passport? Maybe I left it on the plane.
--My Goodness ! You ____________ things behind.
A. had never left B. didn't leave
C. never left
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.