围绕本课标题 Tickets please 请买票（赶火车 · 请买票）主题，AI 老师会出 若干个简单问题，
每个问题听完后，用 完整句子口头作答。
⚠️ 尽量说完整句子，不要只说一个词；优先用本课句型与词语：What time will the next train leave / We've got plenty of time / There's a bar next door to the station / We had better go back / catch the eight nineteen / You've just missed it