单项选择题
A.The box fell down and hit the man on the head. B.The box continued to go up. C.The man went up to the top of the building. D.The man fell down and broke his legs.
A.Schools B.Local, state and national governments C.Families and community D.All of the above
A.the box of bricks B.the ladder C.the top of the building D.the pulley