Hi there!
4) at night, at the weekend, at 8 o`clock
in winter, in August,in 2020, in the afternoon
on 5th April, on Friday morning, on Tuesday
5) 1. We always have breakfast.
2. Tom is never late.
3. They often do their homework in the evening.
4. You usually get up at 7 o`clock.
5. I am sometimes early for school.
6. The students always finish lessons at lunchtime.
