某老年呼吸衰竭病人，因近日咳嗽、咳痰、气急明显，又出现神志不清、发绀、多汗及皮肤温暖，做血气分析PaO₂：6.7kPa，PaCO₂：8.0kPa，应给予 （）

A.高浓度、高流量持续吸氧

B.高浓度、高流量间断吸氧

C.低浓度、低流量间断吸氧

D.低浓度、低流量持续吸氧

E.乙醇湿化吸氧

Henry broke the window .I’ll ask him why __________ .

A．did he do that

B．he did that

C．had he done that

D．he had done that