Ifyou’resittingaroundalonelycampfireatnight,thehowlofawolfcansoundpretty______.
Manypatientsinsistonhavingwatcheswiththeminhospital,______theyhavenoschedulestokeep.
Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
Ittookmeamonthtogetrid_______thecough.
患儿实施氧疗时，一般治疗的给氧浓度（）
