围绕本课标题 A glass envelope 玻璃信封（漂流瓶带来的荷兰笔友）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：never dreamed of receiving a letter / of her own age / were travelling across the Channel / threw the bottle into the sea / ten months later / Both girls write to each other / a little more