Вставьте предлоги 1.i shell go for practice...May 2/my friend will go to the demonstration...the first of May 3.it is

1. I shall go for practice in May. 2. My friend will go to the demonstration on the first of May. 3. It is cold in winter. 4. My father usually comes back home at 9 o\'clock in the evening. 5. They went to the river on the warm day. 6. I was born in 1985.