围绕本课标题 Three men in a basket 三人同篮（气球闯入基地）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：A pilot noticed a balloon / which seemed to be making for / a Royal Air Force Station nearby / He informed the station at once / no one there was able to explain the mystery / The officer in the control tower / angry when he heard the news / balloons can be a great danger to aircraft / someone might be spying on the station / the pilot was ordered to keep track of the strange object / managed to circle the balloon / He could make out three men in a basket / holding a pair of binoculars / the pilot saw one of the men taking photographs / began to descend / landed near an airfield / The police were called in / they could not arrest anyone / two Members of Parliament / the Commanding Officer of the station / one half of the station / did not know what the other half was doing