21. а) Раскройте скобки и употребите глаголы в соответствующей форме.
   There (to be) various forms of government restrictions and regulations in economies. For example, Turkey and Norway both (to limit) profits of firms, the latter also (to control) prices and wages; in Bolivia the tin mines (to nationalize)', in China communes (to establish)', in Cuba the government (to own) many industries and firms; and in Britain eight basic industries (to nationalize).
   A free market economy (to be) rare in the world.
   The level of economy regulation (to be) different in different countries. In some countries it(to grow) in recent years, in others more freedom (to grant) to firms and individuals. But the general tendency (to be) to keep government regulation at quite a high level.
   б) Напишите к тексту четыре вопроса: общий, специальный, альтернативный и разделительный.