A: When do you get up? B: At 7 o'clock.
A: When do you have breakfast/lunch/supper? B: At 8 o'clock/ 1 p.m./ 7 p.m.
A: When do you come home? B: At 3 p.m.
A: When do you go to school? B: At 8:30 a.m.
A: When do you watch TV? B: At 6 p.m.
A: When do you go to bed? B: At 9 p.m.