求翻译：我的父母出差了，要到下个月回来，奶奶又卧病在床，需要人照顾，再说英语考试即将来临，因此我无法前去参加生日宴会。我感到很抱歉，只好写信辞谢是什么意思？

My parents on a business trip, to come back next month, my grandmother and confined to bed, need care, say English exam coming, so I can not go to a birthday party. I am very sorry, had to write politely refuse

My parents come back next month on a business trip and to the sick in bed, and her grandmother, who need care, repeat examinations in English is about to come, I cannot go to participate in birthday party. I am very sorry, but to write remarks Tse

My parents travelled on official business, must come back to the next month, paternal grandmother is ill in bed, needs the human to look after, again spoke English to take a test coming soon, therefore I am unable to go to attend the birthday banquet.I felt was sorry very much, has to write a letter

My parent is away on business, to come back until next month, Grandma is ill in bed, need someone to take care of, say English exams fast approaching, so I can't go to a birthday party. I'm sorry, had to write a decline

正在翻译，请等待...