Ответ:

2 A: What time do you finish work tomorrow?

( употребляем Present Simple, говоря о людях, если их планы фиксированы, как расписание)

B: At 5. On Fridays we usually have a short day. Why?

( употребляем Present Simple, т.к. usually – обычно)

A: We are having a party on Friday.

(договоренность, запланированное действие) Will you come?

(спонтанный вопрос)

B: No, sorry, I can't.

A: Why?

B: We are going out of town on a short holiday. (план) I am leaving on Friday evening.(план)

A: Cool. What time is your train? (расписание)

B: At 5:30.

A: If you need, I will give you a lift to the airport. (спонтанное решение/вопрос)

B: Thank you, don't bother. Polina is dropping me off.(договоренность)