请根据以下中文提示写一封邮件。
Maira邀请Liu Ying 参加她的生日聚会，但是Liu Ying的父母外出出差要到下个月才回来，爷爷又生病在床，需要人照顾，而且她得为了即将到来的其中考试而学习，因此无法参加这一生日聚会。她感到很抱歉，只好发邮件表示歉意。
要求：1.60词。2.开头已出
需用词：外出出差 be out on businness 下个月回来back home next month 即将到来的其中考试 coming mid-term exam
Dear Maria ,
Thank you very much for
Dear Maria ,
Thank you very much for inviting me to your birthday party, but I don't think I can go. My father is out on business, and is back home until the next month, my grandfather is ill and he needs someone to take care of him. Also, I have to study for the upcoming mid-term exam. Therefore i don't think I can go to your birthday party. I'm sorry
From Liu Ying
Dear Maira
Thanks for your invitation . I'm sorry . I can't come to your birthday party .My parent go out for busines. They are getting back home next month .And my grandpa is ill in the bed .I have to look after him .I have to study for my test . So .I'm very sorry . I can't your party . I hope you well have a good time
in your party
Your
Liu Ying
希望你能采纳
谢谢！
Thank you !