补全对话 （共5小题，每小题2分）
Sam ：Good morning ！
Ted：___________________ !
Sam: Tomorrow is my birthday .I’m going to have a birthday party . Can you come to my party ?
Ted : ________________. I have to help my parents.
Sam :Too bad ! __________________,Helen ?Can you come to my party ?
Helen :I’d love to . ___________________ !
Sam :At 8:00 pm.
Helen: OK. See you tomorrow.
Sam :___________________ !