Исправить ошибки в выделинах словах Our room is nicer of their room . Our holidays in Italy were the better. Janet is

1. Our room is nicer than their room.

2. Our holidays in Italy were the best. 

3. Janet is the kindest person I know.

4. It is easier to make a salad than all (*более корректно было бы написать ...than any other dish).

5. He was the strongest person of all.

6. The Arctic is the coldest place in the world.