围绕本课标题 No wrong numbers（用鸽子传消息的趣闻）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 just bought / Yesterday, a pigeon carried the first message. / covered the distance in three minutes / Up to now, he has sent … / In this way, he has begun …