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1. Man living in cities is deprived of his natural environment with which he

formed a well-balanced biological unit in the course of his evolution.

2. 30-50% of mumps infections have been shown to be subclinical.

3. In cities of economically developed countries the acute hazards to health,

e.g. infectious diseases and epidemics, could be eliminated.

4. The introduction of antibiotics and vaccines has significantly decreased the development of infectious diseases in developed countries.

5. Measures for environment protection are being constantly improved by those engaged in the process.

6. Now much attention is paid to stem cells and cellular therapy as a promising method for treatment of different diseases.

7. Vitamin D is often referred to as the “sunshine” vitamin, because ultraviolet light is instrumental in its formation.

8. Consumption of fruit juice has increased since 1950, jumping from 2.1 to 5.4 gallons per person in 1986.

9. The preschool child, ages through three to five years, is improving his skills and learning new ones.

10. Almost half the extra iron needed during pregnancy is used to manufacture hemoglobin for the mother’s expanded blood supply.

11. Numerous studies have confirmed a positive relationship between high excessive body weight and hypertension.

12. Aging is often associated with a decrease in the ability to hear and see clearly.

13. The role of cholesterol in the development of heart disease is becoming better understood.

14. Even people who are not so limited become increasingly less active with age.

15. It will be necessary to realize further experiments to confirm the safety of the method.

16. The injection of the drug has just been made to normalize heart activity.

17. Although diet has little to do with gastrointestinal disease, the diseases and their treatment have often serious nutritional consequences.

18. Food contamination by infectious agents and their toxins may result in poisoning.

19. The research has confirmed the initial findings.

20. This doctor known long ago for his works on ear diseases has developed an artificial replacement for the most fragile bone of the middle ear.

21. We are for the most part ignorant of the long-term effects of noise upon humans.

22. The precise diagnosis will surely have been made by the end of the week.

23. We have even never thought about such a possibility.

24. Most people will at sometime experience the discomfort of heartburn (изжога), a burning sensation behind a breastbone.

25. While alcohol is being transformed into heat or energy it exerts different effects upon various organs.

26. He has been told to follow strict regime of nutrition by his doctor in charge.

27. The new method for gastric ulcer was introduced into practice having been thoroughly tested on laboratory animals.

28. The substance will encircle microorganism and the latter will eventually die.

29. The patient had to come to his polyclinic last week.

30. Almost all chemicals can have adverse effect on human health and environmental quality.

31. Exercise has many benefits in addition to burning calories.

32. The major health problems in developing countries arise from malnutrition interacting with infectious disorders and epidemic parasitic diseases.

33. While examining the results of blood analysis the doctor was asking the patient about previous transfusions and infusions.

34. The untimely treatment has resulted in our case in chronic liver disease.

35. Excretion of poliovirus type 3 into feces has been found in 39 healthy persons, mostly children, out of 700 studied so far.

36. Biologists have made a great contribution to science, having increased our food supplies, developed plants and animals.

37. We suppose that this drug was being used in this clinic for a long time already.

38. Biologists have discovered circulation of blood, digestion of food and many other secrets of life.

39. It is important to study the origin and structure of plant and animal hormones.

40. So far, we were sure the condition resulted from inadequate use of antibiotics.

41. It was not quite clear whether to continue the course of treatment or not.

42. The risk of the infection will be growing since the source has never been found.

43. The experiment had been over we waited for the results.

44. Trying to answer these questions we have developed the plan for our further experiments.

45. Our knowledge of biology has greatly increased due to the new methods and techniques of investigation.

46. The environment pollution has greatly increased recently.

47. The patient was instructed by the doctor how to do insulin injections.

48. This drug had been used for a long time before its toxic effects were recognized.

49. The term “pollution” has been variously defined by different specialists.

50. All the problems concerning the interaction of man and nature are now of international importance.

51. Many factors show that smoking is a direct threat to health.

52. Since 1988, however, the global incidence of polio has declined by over 80 %.

53. For a long time some countries have been free from polio.

54. Women are affected by sarcoidosis slightly more often than men.

55. Sarcoidosis appears to be relatively common in northern Europe.

56. The disease is identified because of abnormalities on a chest radiogram.

57. To do blood test was quite necessary to make differential diagnosis.

58. This patient has been continuously examined for sugar blood level.

59. Patients with myocardial infarction have to stay in bed for at least 7 day period.

60. Patients with gastric ulcer should avoid alcohol and smoking.

61. The substance was recommended for improving drinking water quality.

62. Recently computer methods of diagnostics have been significantly improved and are widely used in many countries of the world.

63. The patient is being examined now for his being ill with hepatitis A.

64. Diagnosis of Cron’s disease had been made before the results of the analyses were received.

65. The use of analgesics has only abolished the pain but not arrested the progress of the disease.

66. Occupation has a great influence on the timing, frequency and type of meals eaten.

67. A small amount of animal protein will also supply enough essential amino acids to make up for the deficiency in a plant food.

68. Salt restriction has long been considered to be an important nondrug treatment of hypertension.

69. Adverse reactions to food have long been recognized.

70. When people eat unusual plants they are in danger of encountering food toxins.