题目内容：

根据情景填入适当的单词是对话完整
A；hi,anna!you look happy today.do you have any good news?
B;yes,i'm going to have a ___tomorrow.
A;what party?
B；oh,it’s my birthday party.don't you know?
A；no,i don't.
B；sorry,i____to tell you.would you like to come to my party?
A；sure,____love to.but what's tomorrow?
B；it's friday the 18th.
A；18th?oh,i'm very_____,i have to go to the piano lesson.______
for your invita-tion.I hope you have a good time tomorrw.
B;that's too bad.