It is necessary that parents should ________ the responsibility of helping their children develop legal awareness.

There are two thousand students in this college, ______ are from the countryside.

—The company has been performing poorly during the past few years.—In my view, it needs to _______ its image.

(2013·湖北高考)In much of the animal world, night is the time ________ for sleep —pure and simple.

--- How come you know the accident so well?--- Well, because I was on the __________.