________ for the free ticket, I would not have gone to the theatre so often.

A．Were it not

B．Had it not been

C．Had not it been

D．Were not it

初产妇，26岁，妊娠40周，规律宫缩8小时入院。查：髂棘间径25cm，骶耻外径20cm，坐骨结节间径7.5cm。枕右前位，胎心率134次/分，肛查：宫口开大4cm，胎头为“0”，3小时后产妇呼叫腹痛难忍，检查宫缩1～2分钟1次，持续45秒，胎心率102次/分，子宫下段压痛明显，肛查宫口开大5cm

该患者最可能的诊断是

A．不协调性子宫收缩乏力

B．不协调性子宫收缩过强

C．协调性子宫收缩过强

D．先兆子宫破裂

E．重型胎盘早剥