读一读，补全对话。
Jenny: I'm excited!
Li Ming: Me, too! I ____________ going on ____________!
Danny: I'm ____________ too! Trains are ____________ ____________.
Beijing is ____________ ____________ ! Come ____________, Jenny and Li Ming!
Let's ____________, ____________ and ____________!
Mrs. Li : Danny! Please ____________ run! Please don't ____________! Please don't ____________!
Danny: Yes, Mrs. Li. I'm ____________.
Mrs. Li: That's ____________, Danny. Please sit ____________.
