1. Who can translate this sentence? 2. You can go to Leningrad by train or by airplane. 3. Could you speak English a year ago? 4. I hope they will be able to reach the village before it is dark. 5. You may go away now, I shall finish the work myself. 6. Every engineer must know at least one foreign language. 7. Your son must stay in bed because he is still ill. 8. You should take a taxi if you don't want to be late for the concert. 9. Students are not allowed to smoke in the classrooms. 10. He was not allowed to enter the concert hall after the third bell. 11. As he received a bad mark, he had to go over the material again. 12. We were to meet at the station at six. 13. He was to stay at the office until the report was ready. 14. You will have to repeat the material of the lectures before the examination. 15. We were to send his letter of recommendation by air mail. 16. You should try to find out all the essential facts connected with his work in the Antarctic. 17. The team of experts is to study the present situation in the country. 18. Do you know the student who is to make a report at our next meeting? 19. You should influence your friend. He is not studying the way he should. 20. All the students of our group should be present at the meeting.