Используйте притяжательные падеж имён существительных, например: The book by this writer is interesting - This writer's book is interesting. :
a) The pictures of the artist are very beautiful ;
b) The plan of the report is good;
c) The letter of his friend is long;
d) The cover of the book is red ;
e) The uncle of Fred is a doctor

Artist's pictures are very beautiful Report's plan is good.His friend's letter is long.The book's cover is red.Fred's uncle is a doctor.