阅读短文，完成下列任务。
It's October 31st. It's Halloween. The children are very happy. They are making masks(面具). They are making jacko'lanterns(南瓜灯). Then they dress up like ghosts(扮作鬼). In the evening, they go from door to door. They knock at the door of a house and cry, "Trick or treat! " A woman comes out and gives them some sweets. They thank her and go to another house. They knock at the door and cry, "Trick or treat! " This time a tall ghost comes out. The children cry "Ah! A ghost! " and run away. "Don't run away, " the ghost cries. "It's just us. We are Bob and Rob. " The children all laugh.
