Почему голова кометы, приближающейся к Солнцу, приобретает параболоидную форму?

1. To stay competitive, hi-tech firms must constantly. innovate otherwise their products become out of date.
2. Before we can decide where to buy the equipment, we need to cary out market research.
3. He didn't dare argue with his superior.
4. The first thing a commercial must do is to catch the potential customer's eye.
5. Our main competitors were heard to become insolvent.
6. The employers tried a lock-out make the workers accept their terms.
7. There is nothing for you to do but consult with the tax lawyer.
8. Why not consider our own employees first for any vacancies?
9. The supervisor lost control of this subordinates afther he allowed them to override
his decisions.
10. Hi-Marks Company is an exclusive distributor in our region,so we are forced to purchase domestic appliances from them.