1. 对话：
    Donna：Hi. Sorry I'm late.
    Bill： Oh，that's OK. We just got here. Donna，this is my fiancé，Mary. Mary，this is my old friend，Donna. We went to school together.
    Mary： Hi，Donna. I'm really glad to meet you.
    Donna：Hi，Mary. I've heard a lot about you.
    Mary： All good，I hope!
    Bill： Donna just got back from California.