А. Present Indefinite

Б. A person who treats the diseases of the inner organs.

В. A person who treats the ear, nose, and throat disease.

Г. A physician who treats the disease of the nervous system.

Д. A physician who treats the disease of the alimentary system.

549. Finish the sentences choosing necessary variants: A neurologist is a physician :

А. Who treats the disease of the nervous system?

Б. Who treats the disease the lower and upper extremities?

В. Who does not treat the disease of the nervous system?

Г. who treats ear, nose and throat diseases?

Д. Who treats the disease of the alimentary system?
550. Finish the sentences choosing necessary variants: A physician :
А. A person who investigates the life of plants.

Б. A person who investigates the life of microorganisms.

В. A person who is not responsible for the life of patients.