第1个回答 2010-12-26
Dear xxx
thanks for invitation.but i really sorry about that i can't attend it. because i have to look after XX, she has had a cold you know.i have to help her parents do some housework.
i defintly sorry about that again.i wish you had a good time and happy say birthday to you
YOURS
第2个回答 2010-12-26
Dear XXX,
I am glad to receive your invitation for your birthday party and thank you very much,but i am really sorry,as i was very busy on my work ,and there are too many things i should do right now ,i have no spare time for your party.I promise the next year i will come to your party on time.
At last,happy birthday to you !
Best wishes to you !
Yours XXX,