вместо точек воткнуть слова was,were,will be my father ... a teacher.He

Was - глагол, употребляющийся в прошедших временах (2 форма глагола to be), относится к личикам в единственном числе
Were - глагол, употребляющийся в прошедших временах (2 форма глагола to be), относится к лицам во множественном числе
Will be - глагол, употребляющийся в будующих временах
1) My father was a teacher.
2)He was pupil twenty years ago.
3) I will be a doctor when i grow up.
4) My sister will not be at home tomorrow. She will be at school tomorrow.
5) You will be at home tomorrow
6) Your father was at work yesterday.
7) My sister was ill last week. She is not ill now.
8) Where were you yesterday? I was at the cinema.
9) When I will come home tomorrow, all my family will be at home.
10) - Is your little sister in bed now?
- Yes,she is.
11) - Will you be at school tomorrow?
- Yes,i will.
12) When my granny was young,she was an actress.
13) My friend is in Moscow now. He will be in St.Petersburg tomorrow.
14) - Where are your books now?
- They are in my bag.