用方框中所给单词的适当形式填空，每词仅用一次(每空一词)。

Halloween is celebrated in North America. People celebrate it on October 31st. Many people make their look scary by turning off the lights or putting spiders and ghosts around their doors and windows. Children love the festival they can dress up as ghosts or black cats. Some dress up as fun things like cartoon characters. Their parents take them to visit neighbors. They like to play a game Trick or Treat. It means if you don't give children a treat, they will play a trick on you. Although Halloween is popular in North America, people in China seldom celebrate it.