The doctor tried his best to s____ the boy's life.

The doctor tried his best to s____ the boy's life. the doctor tried his best to save the patient's life,___fail The doctor tried their best to save the old man"s life,_____ The doctor has tried ____ to save the boy's life. The doctors tried their best ____ the dying boy's life,but t The little boy tried his best to amuse his mother,only____ t The determined boy tried his best to solve the problem,_____ Finally,the doctor ____the boy's life The doctors tried their best to save the patient's life,＿＿fa The doctor has done his best to save the ______ boy(die) he tried his best to save the drown girl,but unfortunately s 单选 The doctor tried his best（）the young man.