X. Укажите номера предложений, в которых –ing-форма переводится деепричастием, оканчивающимся на –а или -я

1. Starting the experiment we were aware of its final positive results.

2. The sea level is rising very slowly from year to year.

3. Bones are classified according to their shape.

4. We found this property of the drug while studying it in laboratory.

5. Being used by the experienced doctor the drug produced a positive effect.

6. The conference starting next week will be devoted to environmental protection

7. Trying to confirm our results we performed a number of similar experiments.

8. The coming session will be rather difficult.

9. Exocrine glands are classified according to their ducts.

10. Coughing we expel thousands of microbes into the surrounding air.

11. The doctor examining this patient is a well known specialist.

12. Beginning the experiment we hoped to confirm our hypothesis

13. The patient observed by the doctor was suffering bronchitis.

14. While examining the patient, the doctor asked him about his present complaints.

15. Learning physiology will help medical students to understand the processes operating in the human body.

16. Coming in time is a good habit.

17. Performing the function of the sense organ the skin contains many sensory nerve endings

18. When examining a patient the doctor noticed some abnormalities.

19. Plasma was being studied for many years but with poor results.

20. Coughing and sneezing are the signs of a respiratory disease.