王老师:19139051760(拨打)复制微信 题目 更新时间:2023/8/26 He begaworking with balloons______________.·as a relaxatiofrom his work oaircraft·as part of his job at the time·as a hobby·whehe heard that some Americans had crossed the Atlantic ione 答案 登录 注册 单选题·as a hobby 出自:青书学堂 >> 华北水利水电大学英语 华北水利水电大学继续教育学院