As the busiest woman in the village, she made _____ her duty to look after all the other people's affairs in

that village.[ ]

A. this

B. that

C. one

D. it

麻醉前已怀疑或确认为困难插管的病人，下列哪种插管方法最安全

A．清醒插管

B．以上都不是

C．气管切开

D．全麻下纤维光导镜插管

E．喉罩通气