Question

Look at the letter in Ex.1.Underline the possessive adjiectives.Then write them down and fill in missing ones

Answer 1

1) grandmother's 
2) grandfather's
3) parents'
Больше притяжательных прилагательных нет, пишу притяжательные местоимения
4) my
5) his
6) her

Answer 2

In order to answer your question, I would need to see the letter in Ex.1. Without the letter, I cannot identify the possessive adjectives and provide a detailed response. Please provide the letter so that I can assist you further.