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A
1 My father used to work for the local authority for many years.
2 -
3 -
4 I used to go to the school in the next street for many years.
5 I used to play soccer for a long time but I don't anymore.
6 I used ot have long hair all the time when I was at primary school.
7 -
8 -
9 I used to eat a lot of chocolate when I was a child.
10 -

c
1 I may go to the swimming pool.
2 We may not be here tomorrow.
3 My mother may not be at the meeting.
4 We may be seeing each other for the last time.
5 I may or may not go on the school trip.
6 They may be here later.
7 We may never know what really happened.
8 My team may win the Championship.
9 We may not see the start of the film.
10 He's annoyed - he may not come back.