Вопрос:

4 A: What time ............ (you/have) breakfast? B: 7 o'clock. The school bus ............ (come) at 7:30.

Ответ:

4. What time do you have breakfast?

A: What time do you have breakfast? (This question is about a regular routine, so present simple is used.)

B: 7 o'clock. The school bus comes at 7:30. (This is a scheduled event or routine, so present simple is used. 'Comes' is the third-person singular form of 'come'.)