根据语境从方框中选择恰当的短语填空。有的需要变换形式。每个短语限用一次。

knock, come, look, colour, ready, cut, open, symbol activity, also

    Halloween is all important holiday in America. It on the evening of every 31st October. The pumpkin(南瓜)is a(n) of Halloween. So orange has become one of the traditional Halloween . Another traditional colour is black. It is probably because Halloween take place(发生)at night. Every autumn, when vegetables are , children pick large orange pumpkins. Then they faces in pumpkins and put burning candles (蜡烛) in them. It looks as if there was a person out of the pumpkin. Children like wearing strange masks(面具)and clothes every Halloween. They carry bags and on neighbours'doors from house to house. The neighbours their doors and put sweets or fruit in their bags. If people don't give them food, the children will play a trick (恶作剧)on them.