1. wish – The correct word is "wish" because it refers to expressing good luck or good fortune, especially on New Year's Eve.

   Correct sentence: "everyone says 'Happy New Year' and they wish their friends and relatives good luck."

2. dress – Children usually dress up in costumes for Halloween. "Dress" is the appropriate verb here.

   Correct sentence: "On this holiday children dress as witches, ghosts or other characters."

3. from – The correct preposition is "from" because the children are going from one house to another.

   Correct sentence: "Most children go from house to house and say 'Trick or Treat', asking for candy or fruit."

4. usually – "Usually" fits the context best because it suggests that it is common, but not guaranteed, that children will receive candy or fruit.

   Correct sentence: "But this usually happens. Most people give them candy or fruit."

So, the complete text is:

"New Year is one of the most important festivals in the United States. On New Year's Eve, most people go to parties. At twelve o'clock at night, everyone says 'Happy New Year' and they wish their friends and relatives good luck. New Year's parties usually last a long time. Many people don't go home until morning. Another holiday, Halloween, is mainly for children. On this holiday, children dress as witches, ghosts, or other characters. Most children go from house to house and say 'Trick or Treat', asking for candy or fruit. If the people at the house do not give them candy, the children will play a trick on them. But this usually happens. Most people give them candy or fruit."