Напишите по с 5: 00 a.m. ; в 5: 00 p. m. ; 8: 30 ; 15: 10 ; в 1: 15 ; 12: 40

It was five o'clock.
Аt eight and an half.
It's ten to ten minutes past three.
It's about fifteen minutes from the hour
no more than 20 minutes