上诉成立的条件是( )。
A.上诉人必须具备上诉权
B.必须有适当的被上诉人
C.当事人应通过原审人民法院提出上诉
D.必须在法律规定的上诉期限内上诉
参考答案:A,B,D
物业综合管理具有物业管理委托性和()的基本特征。
When I got to the cinema, the film _____ for five minutes.[ ]
A: had started
B: had been on
C: has been on
D: has started