3.1 Yes, Mary likes her holiday in Oakwood.
3.2 People of Oakwood are really friendly.
3.3 The lady they are staying with is about fifty-five.
3.4 Mary thinks they are lucky because they are doing just what they want to do: sleeping, eating and playing games.
3.5 The sea is not warm. (It's rather cold)
3.6 They spend a lot of their time on the beach.
3.7 They are going to be back on Tuesday, June, 21.