Укажите номера предложений, в которых глагол-сказуемое стоит в группе завершенно-длительных времен

1. The treatment being used in this particular case turned to be very effective.

2. This disease was said to be widely spread in the Southern regions of the country.

3. By the end of this year he will have been working in the Research Center for Pulmonlogy for 15 years already.

4. Skin has a complicated microscopic structure and carries out many functions.

5. Having examined the patient the doctor prescribed him bed rest and a course of injections.

6. Although the operation was successful, the patient is still weak as he had been suffering from the disease for several years.

7. At last the results which we have been looking for several months were obtained.

8. The patient had been sleeping for two hours when the nurse came to give him the injection.

9. Vaccination may result in protection against a particular disease without producing any serious harm to the body.

10. Once such widespread epidemics had been observed in this area, but it was very long ago.

11. The researcher had been waiting for the first results of the experiment since early morning when at last the reaction began.

12. At present we may say that this organism is as spread just as it had been spread two decades before.

13. The professor remembered the fact when he was reading the article in the Journal of Cardiology.

14. By the time you’ll return from your business trip he will have been staying at our hospital for 3 weeks.

15. The virus has been growing in culture medium for 2 days already.

16. It is true that revolutionary advance in medicine has only been made over a past century or so.

17. Otolaryngology has been developing a system of its own with its own classification of diseases for more than 30 years already.

18. By the beginning of the new century this process will have been continuing for 10 years already.

19. Vaccination being used in time the disease did not affect many people in locality.

20. Since you had to do the examination of the area two days ago you are to give me the report just now.

21. The disease should be eliminated without waiting for the results of bacteriological analyses.

22. A whole series of antibacterial substances derived from bacteria have been developed after Fleming’s discovery of penicillin.

23. The patient has been waiting for his district doctor from the morning.

24. It is a well known fact that having done the work a scientist feels some kind of dissatisfaction.

25. He was asked a lot of questions on the problem he had been working over for the last several years.

26. If you are tired you’d better have a little rest and then you may go to the ward.

27. I wonder, if you have ever been present at such a representative meeting of gastroenterologists.

28. Progress was continuously being made in the field of new drugs development.

29. When Pasteur was experimenting with causes of chicken cholera he began to inoculate healthy chicken with weakened cholera bacteria.

30. For thousands of years man had been thinking that there was no treatment for diseases when Pasteur has shown that immunization may prevent some of them.

31. Without being a practitioner Celsus was, however, a friend of physicians, a man of vast culture.

32. The study of HIV-infection has been slowly progressing for the last 10 years.

33. To learn the way the microorganism penetrates the body we had to study hundreds of case histories of patients.

34. At present it is difficult to speak about the prognosis since the process has been developing for a long time and affected all the organs in the abdominal cavity.

35. Lungs are said to have been involved in the process, but this fact is to be confirmed by laboratory investigations.

36. We expected the experiment to have been finished by the end of the week but this previously unknown reaction confused all the plans.

37. The importance of the data obtained will have been increasing during the next several years.

38. He had been planning to obtain new data on chemical structure of the fluid when he was informed about some new facts.

39. The drug was being produced in our department from September 12 to November 30 last year.

40. I’m not ready to answer you question now since the next phase of the study will have to take place only in a month.

41. The experiments are being carried out to prove the efficiency of stem cells in tissue reparation process.

42. The scientist had been studying side effects of the drug on laboratory animals for a month already when he accidentally found this article.

43. The substance was being studied for its side effects for the whole month.

44. The patient had been examined for the presence of staphylococci in his blood before the therapy was begun.

45. To make the final diagnosis the patient will have to undergo some instrumental methods of examination.