Question

write a letter to your cousin about her recovery from long illness

Answer 1

you have to write ur cousin address at the top right corner first of all in formal letter which is more important than the the body of the letter

hey (name of ur cousin) I'm (ur name) I'm so happy that u recovered from long illness and i also feel sorry for ur sufferings on those days............ blah blah blah
and finish the letter by writing (since it is a unformal letter) yours lovingly (ur name)