I. Вставьте модальные глаголы can, could, may, must.

1. If there are a few firms in an industry, the change in the behaviour of one firm may influence other firms

2. Can developing countries enter the European Union?-No, they can't.

3. The firm could increase its profits by means of new materials or technologies.

4. Any crisis in the economy of the USA can seriously influence the economies of other nations.

5. Any country must follow some rules in international trade.

6. Can Russia supply its population with necessary amounts of gas and petrol? - Yes, it can.

7. British farmers could not ensure the required quality of meat when there was an infection among animals a few years ago.

8. You must have a special licence to import or export exotic animals.