The festival of Halloween has its roots in Celtic traditions. Over 2,000 years ago the Celts in Britain had a special holiday in late October to mark the (1) (BEGIN) of winter. Another autumn (2) (CELEBRATE) was connected with the passing of the dead. These two events later became Halloween. On Halloween children often dress up as ghosts, witches and monsters and go around people's houses, asking for sweets. In most cases the ghosts and witches are not frightening at all, they are even (3) (FUN)! But remember that if the children don't get the sweets, they may play some (4) (PLEASANT) joke, for example splash some water on you. Pumpkins also (5) (SYMBOL) Halloween. People (6) (USUAL) make lanterns from them.

Решение:

1. The festival of Halloween has its roots in Celtic traditions. Over 2,000 years ago the Celts in Britain had a special holiday in late October to mark the (1) beginning of winter.
2. Another autumn (2) celebration was connected with the passing of the dead. These two events later became Halloween.
3. On Halloween children often dress up as ghosts, witches and monsters and go around people's houses, asking for sweets. In most cases the ghosts and witches are not frightening at all, they are even (3) fun!
4. But remember that if the children don't get the sweets, they may play some (4) unpleasant joke, for example splash some water on you.
5. Pumpkins also (5) symbolize Halloween.
6. People (6) usually make lanterns from them.

Ответ: 1. beginning; 2. celebration; 3. fun; 4. unpleasant; 5. symbolize; 6. usually.