1. It's very difficult to start a private university. 2. They're really difficult for plants to produce. 3. A line of demarcation is difficult to draw . 4. It was quite difficult either to lie or sit or stand . 5. At certain times in their development young people will face particularly difficult problems. 6. The answers to these questions are not too difficult to guess . 7. Difficult objects have been created.8. It was no doubt a very responsible and difficult post . 9. To what's widely regarded as the world's most difficult conflict, 10. Living conditions in Tashkent were very difficult .
