Ответ: 1. Learn — it’s never too late. 2. A rest is what you need right now. 3. Smoking is bad for health. 4. To be or not to be is the question. 5. To translate business letters is the work of our secretary. 6. To marry is the only thing my sister thinks about. 7. It is not right to agree to any conditions. 8. You need to reach our colleague immediately. 9. It is not good to promise and do nothing. 10. It is important — always be ready to help people. 11. It’s ridiculous to wear such short pants. 12. How could you forget to lock the door? 13. Who advised you to buy such a round marble table? 14. Our neighbor tried to find a new job three times, but did not find it. 15. My friend’s dream was to become a lawyer. 16. Her talent was to write songs and sing them. 17. His trouble was not to forgive anyone.