----Why are you late ?

----sorry, the bus I took ______ the mud for half an hour, so I had to walk here.

A．had stuck in

B．has stuck in

C．was stuck in

D．has been stuck in

COPD、肺性脑病、昏迷（）.

A.鼻导管吸氧

B.面罩吸氧

C.无创通气

D.气管插管、机械通气

E.高压氧舱