2.
1)Some friends of yours have just moved into a flat on a busy street. It is very noisy.They'll have to get used to the noise.
2)Jack once went to the Middle East. It was very difficult for him at first because of the heat.He got used to the heat.(он привык к жаре сейчас)
3) Sue moved from a big house to a much smaller one. She found it strange at first.She had to get used to living in small house.
4) The children at school had a new teacher. She was different from the teacher before her but this wasn't a problem for the children.THe children soon got used to their new teacher.
3.
1)No, I'm used to living alone.
2) No, I'm used to sleeping on the floor.
3) I'm used to working hard.
4) Yes, I'm used to going to bed early