IV. Read text b without a dictionary and retell it: Text b.

One of the research institutes carried out an interesting experiment. Six young persons – four men and two girls did not sleep for 124 hours. They were under the constant observation of the doctors who took their cardiograms, determined the pulse and blood pressure, and carried out many other investigations.

Not to fall asleep they were allowed to do physical exercises, dance and play, but they were not allowed to take any stimulants. Vision, hearing and various reflexes were often examined during the experiment.

The experiment was successful. Its findings showed that prolonged sleeplessness increased the amount of sugar in the blood, decreased the level of vitamin B1 and B2, produced considerable increase of white blood cells and decreased the amount of iron in the blood.

Lesson 12

Грамматика: Perfect Passive, усилительная конструкция It is … that

The brain

-ancy (-ency) - суффиксы существительных.

I. Прочтите и переведите следующие слова:

1. insufficiency, urgency, persistency, emergency, deficiency, efficiency,

dependency, infancy

II. Распределите сказуемые по группам:

a. Continuous Active в. Perfect Active с. Perfect Passive d. Simple Passive

1 . is carried out

2. will be reading

3. has been discovered

4. was controlled

5. will have found out

6. had treated

7. were determining

8. have been operated

9. had had

III. Прочтите предложения, определите в них сказуемые и переведите предложения:

1. The new methods of research had been included into the work. 2. The course of treatment has been prolonged by the cardiologist. 3. The structure of the pancreas will have been described in the article. 4. The direction of the nerve fibers has already been established experimentally. 5. Several new medical schools have been founded in our country. 6. The exact amount of the blood in the experimental animal has just been estimated by the researcher.

IV. Найдите, прочтите и переведите предложения в Perfect Passive:

1. The doctor has treated the patient with pneumonia. 2. My brother has been treated in this clinic. 3. The group of researchers are working on a new drug for cancer. 4. The professor has just delivered the lecture on the exchange of gases in the lungs .5. Tomorrow from 10 till 15 the students of our group will be taking the exam in chemistry. 6. I has already been asked this question.

V. Переделайте предложения по модели:

e.g. The students have translated the text. – The text has been translated by the

students.

1. My friends have completed the work.

2. The scientist has proved the important findings.

3. The laboratory worker has counted the number of leucocytes.

4. The doctor will have discharged out the patient by 12 o’clock.

5. The students have just listened to the lecture on the functions of the brain.