Привет,нужны твои знания :) Не понял это задание ..Надеюсь поможешь .Удачи

1. you mustn't point at people you don't know. 2. you needn't buy gifts for all your friends. 3. you must say please and thank you.  4. you needn't take your shoes off. 5. you mustn't forget to send your grandparents a card.