Решение:
Заполним пропуски предлогами at, in или on.
- I drink tea in the morning. (Время суток - in)
- Rachel goes jogging in the afternoon. (Время суток - in)
- They go to the park on Sundays. (Дни недели - on)
- He goes to bed at ten o'clock. (Точное время - at)
- Ann's sister doesn't go to work on Tuesdays. (Дни недели - on)
Ответ: in; in; on; at; on.