Ex.7
1. When water freezes, it turns into ice. (0 conditional)
2. If you're hot, I will open the window. (1 conditional)
3. If you heat ice, it melts. (0 conditional)
4. If it rains, we won't go to the beach. (1 conditional)
5. If I go to bed late, I always feel tired the next day. (0 conditional)
