Закончить предложения 1)unless 2 ) if the weather gets cold 3) if i study late in the evening 4)snow meits when

1. unless I finish my house work, I can't go out.
2. if the weather gets cold, I won't visit my mother.
3. if I study late in the evening I will feel sleepy next morning.
4. snow melts when it is warm weather.