Решение:
- We go to bed at midnight.
- Dad usually cooks in the morning.
- School starts in September.
- They usually go to work at 8 o'clock.
- Children don't go to school on Sunday.
- The baby is sleeping at the moment.
- We usually watch TV in the evening.
- My birthday is on April 15th.
- We go skiing in December.
- Al goes to the cinema on Tuesday evenings.
Ответ: 1. at, 2. in, 3. in, 4. at, 5. on, 6. at, 7. in, 8. on, 9. in, 10. on