He was unhappy when he sold his guitar.After all,he________it for a very long time.
Although the novel isn't popular among adults, it __________ the youth, especially boys.
Jenny was shaking and crying at the corner of the street as if she __________ frightened by somebody.
A healthy lifestyle is often considered to be __________ exercise, mood and diet, and so on.
Jack wasn't saying anything, but the teacher smiled at him __________ he had done something very clever.
The experts were doing their experiment in the lab, __________ what happened outside.