围绕本课标题 A polite request 彬彬有礼的要求（交警留字条）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：If you park your car in the wrong place … / lets you go without a ticket / Traffic police are sometimes very polite / pay attention to our street signs / cannot fail to obey it