Translate the sentences. Define the tense of the predicate. 1. By the time the hospital is built, we’ll have graduated from the Academy. 2. Some scientists had worked in the laboratory before they started their work at the University. 3. Since the 19th century scientists have made great progress in genetic experiments. 3. The surgeon hasn’t discharged this patient from the clinic yet. 4. All of these patients had had positive results before the operation. 5. Prof. Dmitriev has just delivered his lecture on the exchange of gases in the lungs. 6. The doctor hasn’t prolonged the treatment because the patient feels well. 7. Vet’s assistants will have collected urine samples of sick animals by tomorrow. 8. I’ll have read this book by the end of the week. Exercise 128. Put questions to the underlined words. Start them with the words given in the brackets.