Поставьте глаголы в скобках в Present Simple, Past Simple, Future Simple,

2. At the age of twenty my father combines work and study. (Present Simple)
At the age of twenty my father combined work and study. (Past Simple)
At the age of twenty my father will combine work and study. (Future Simple)
At the age of twenty my father is combining work and study. (Present Continuous)
At the age of twenty my father was combining work and study. (Past Continuous)

3. What do you do at five oclock? (Present Simple)
What did you do at five oclock yesterday? (Past Simple)
What will you do at five oclock tomorrow? (Future Simple)
What are you doing at five oclock? (Present Continuous)
What were you doing at five oclock yesterday? (Past Continuous)