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12 Pick out the verb in each sentence and say whether it is the active or passive voice:

1 The patient had been treated for pneumonia before entering the surgical department. 2 The lecture has just been finished and the professor has gone out from the lecture hall. 3 Have you already been operated upon for appendicitis? 4 The fractured bones of the extremities had been set and put in plaster of Paris. 5 In the dressing room the surgeon took out the stitches which had been put after the operation. 6 Great success has been achieved by investigators in treating cancer. 7 The surgeon replaced the affected vessels with a plastic transplant. 8 The doctor was examining this patient when we came into the ward. 9 This problem is being investigated at dozens of clinics, medical faculties, sanatoria, hospitals and dispensaries under the general guidance of the Institute of Pulmonology. 10 This professor had delivered a lecture by 5 o'clock yesterday. 11 Modern medicine has already created quite a number of artificial organs. 12 The scientific institutes have been opened in some cities of Ukraine. 13 A group of physicians headed by professor Chumak is doing very important and interesting work. 14 These scientists have created a few experimental models of an artificial heart. 15 After the patient had suffered profuse external bleeding he developed severe anaemia. 16 While the surgeon was performing the operation he revealed the ulcer on the anterior side of the stomach. 17 The dullness which was revealed on percussion was associated with the pathologic changes in the left lung.

13 Make these sentences affirmative:

1 Will the curriculum of different terms be varied in future? 2 Is the vital capacity of the lungs in an infant changed with age? 3 New experimental findings were not established by the young scientist.

14 Define the tense forms and voice of verbs in the following sentences:

1 As soon as this doctor had finished his morning round he began to fill in some cards. 2 The mechanism of this influence has not been fully discovered. 3 Such operations are done even on such big vessels as the aorta. 4 Cardiovascular diseases are being discussed by the scientists of all the world. 5 These cardiologists in recent years have shown definite results in the battle for a healthy heart. 6 These drugs are also used in aerosol form. 7 The scientists who suggested this method believe that it will soon be widely used in our country. 8 Today the heart is operated on not only in cases of congenital heart failures, but defective cardiac valves are replaced completely and operations are made on the heart in case of coronary diseases; when the vessels feeding the heart are affected. 9 Vascular surgery and, in particular, surgery of coronary vessels has made great progress. 10 Now more than 150 variations of congenital cardiac failures have been described by many scientists. 11 The achievements of electronics, physics, chemistry, mathematics and cybernetics have greatly helped the surgeons in their work. 12 Now, more than 150 variations of congenital cardiac failures are studied by many scientists. 13 These scientists have taken the lead in the solution of this problem. 14 They are studying many questions of organ and tissue grafting. 15 Research is being done on the grafting of vessels, skin, bones, etc. 16 Neurosurgery, one of the youngest branches of medicine, has greatly advanced in the scientific investigations. 17 Over 25000 major operations have been performed at this institute. 18 Neurosurgical operations are performed with practically no loss of blood.

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