下列关于起重吊装作业失稳原因的表述中，不属于吊装系统失稳的是（）。

A.超载或机械故障

B.多机吊装的不同步

C.多岗位指挥协调失误

D.桅杆系统缆风绳、地锚失稳

— I'll be able to come to see your performance at 8:30 tomorrow evening.  

— I'm sorry, by then my performance ___ and I ____ reporters in the meeting room. [ ]

A. will be ended; will meet          

B. is to end; will meet

C. will have ended; will be meeting    

D. will end; am going to meet