Question

Letter to your friend explaining why you could not attend his / her birthday celebrations

Answer 1

(Writers Name)
(Writers Address)
(Date)

To (Friends Name)
Hi, (Friend) i am so sorry that i can't attend your Birthday because i was having 10 exam and i was studying all night that's why i can't attend your birthday for this i am so sorry but i promise to you that i will attend your next birthday.
Your Friend/ Your Best Friend
(Writers Name)