主題句：I'm already locked into something else. 我已經有別的事了
    SCENE 1
    Jane： Let's go and enjoy the evening party at the Window of the World. 一起去世界之窗看晚上的表演吧。
    Jack： I'm sorry. I'm already locked into something else. 對不起，我還有別的事要做。
    SCENE 2
    John： Would you like to go swimming with us？ 和我們一起去游泳吧？
    Helen： Sorry, I'm already locked into something else. I haven't finished my homework. 對不起，我有別的事要做，我還沒有完成家庭作業(yè)。
    SCENE 3
    April： Why don't we have dinner together tonight？ 今晚為什么不和我們共進晚餐？
    Jenny： I'm already locked into something else. I can't go. I'm sorry. 我被別的事纏住了，不能去，真抱歉。
    SENTENCES
    1. Sorry, I won't be able to attend your opening ceremony. I'm already locked into something else. 對不起，我不能參加你們的開業(yè)典禮了，我已經有了別的安排。
    2.Sorry, I won't be able to attend the meeting. I have a doctor's appointment. I've already locked into something else. 抱歉，我不能參加會議了，我有別的事要做，我要去看醫(yī)生。