XI. Укажите номера предложений, в которых присутствует инфинитив1. The doctor on duty entered the ward to examine his patients. 2. The doctor in charge prescribed new drug to his patient. 3. The student observed the surgeon operate the patient with appendicitis. 4. The disease is due to the exposure to harmful environmental factors. 5. The main function of the skeleton is to protect inner organs. 6. Vegetables and berries may be contaminated by dangerous viruses and microbes. 7. The student could have answered this question if he had read the text up to the end. 8. The foods important to life are basically protein, carbohydrate and fat. 9. The brain is a part of the nervous system, which sends electrical impulses to the body for both autonomous and voluntary functions. 10. This drug was thoroughly studied last year and now it is recommended for clinical use. 11. Viruses may cause infection in man and animals. 12. The nurse on duty gave an injection to the newly admitted patient. 13. The patient should always follow doctor’s prescriptions. 14. To realize this task was next to impossible. 15. The spread of the disease was due to poor sanitary conditions. 16. My friend wants to be a surgeon. 17. The doctor on duty went to the ward. 18. Respiratory tract symptoms may be wild. 19. M. V.Lomonosov made a great contribution to the development of natural science in Russia. 20. You should be more attentive at the lessons.
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