Directions: Listen to the following paragraph and fill in the blanks. Certain fields of medicine require special______ training and skill. One specialist is a surgeon, who treats diseases by means of _______operations. Some doctors prefer to treat only certain kinds of illness, thus becoming specialists in their_______ fields. Other doctors often consult them when a patient needs their special skill and knowledge. For example, a general practitioner might refer a pregnant woman to an obstetrician. The obstetrician cares for her and delivers her baby. A pediatrician, who specializes in _______diseases, then takes over the care of the infant.