围绕本课标题 A cold welcome（市政厅大钟停了 · 用过去完成时讲述经历）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：we went to the Town Hall / had gathered under the clock / at five to twelve, the clock stopped / The big clock refused to welcome the New Year. / began to laugh and sing