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.
_______in the wall behind the kitchen, the door was hard to find.
The old professor gave a long _______ lecture, and made us so _______ that we all felt sleepy.
Climbing onto the top of the mountain,_______.
The flowers_______ sweet in the botanic garden attract the visitors to the beauty of nature.
Our class teacher, _______ that he didn't agree with us on the plan for a picnic, left the classroom.