英语作文 八十字左右 假如你是Nancy.你的朋友Alice假如你是Nancy.你的朋友Alice邀请你参加明天的春游活动,但是你不能去,你得呆在家里照顾生病的妈妈.请给Alice写一张便条捎给她

Dear Alice
I am really glad that you would like to invite me to tomorrow's spring outing,I really want to go with you,but I am afraid I can' t,my mom is ill and I have to stay at home to look after her.What a pity!Hope you will have a nice trip tomorrow!
Nancy