谁帮我翻译下列英语作文！！！！！！！急啊！！！明天考试！！！！要保证全对！！！！！

中文如下（可适当想象）：
xxx：
谢谢你的邀请，我没时间（没空）参加你星期天的生日派对，我外婆卧病在床，我妹妹还小，我必须照顾她。而且英语考试快到了，我必须为考试而复习。所以不能参加你的派对，请原谅。下次我一定会参加的，
Yours，
xxx
80词左右，语法朴素点，可以加点东西，要恰到好处，别太华丽了啊，要求质量啊！！！

Dear Lucy:
Thanks for your invitation.But I'm so sorry that I can't attend your birthday party on Sunday.Because my grandma was ill and I have to to look after my little sister. What's more, the English examnation is coming soon, I must do some preparation for it.Would you forgive my absence? I'll be your birthday party next time.
Yours,
Lily

xxx：
Thank you for your invitation, I do not have time to your Sunday's birthday party, my grandmother is ill in bed, my sister isstill small, I have to take care of her. And the English exam is coming, I have to review for the exam. So I can not cime toyour party, please forgive me. Next time I will come next time .
Yours，
xxx
上面的是机译的， 我是人工翻译的，选我啦！

xxx：