围绕本课标题 Quick work 破案“神速”（丢了 20 年的自行车被找到）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：has been worried all week / was asked to call at the station / why he was wanted by the police / his bicycle had been found / was picked up in a small village four hundred miles away / It is now being sent to his home by train / was most surprised / was stolen twenty years ago