慢性呼吸衰竭并发肺性脑病，不宜吸高浓度氧的主要原因是（）

A．防止引起氧中毒

B．缺氧不是主要的原因

C．高浓度氧可降低颈内动脉窦化学感受器的兴奋性

D．促使二氧化碳排出过快

E．诱发代谢性碱中毒

So seriously       that he had to stop playing in the football match

A．his feet were hurt

B．were hurt his feet

C．hurt were his feet

D．were his feet hurt