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 ____________.