孕妇24岁，G1P0，孕39周，入院前一天 * * 大量流水，24小时后行缩宫素引产，第一产程5小时，第二产程10分钟，胎儿娩出后2分钟，患者突然寒战，呛咳，发绀及血压下降至80/60 mmHg， * * 流血不止，立即交叉配血，进行抢救。

确诊的依据是

A．早破水史

B．产后 * * 大量流血

C．有休克表现

D．母体下腔静脉血中检查出毳毛

E．使用过缩宫素

The reason _______ he gave at the meeting was not the exact reason _______ he failed to show up on time.

A．why; that

B．which; that

C．that; why

D．that; which