I. Поставьте предложения в вопросительную и отрицательную формы. 1. The percentage of British exports in world trade declined significantly. 2. Business transactions usually start with enquiries. 3. Investing in infrastructure for industry will encourage economic growth.

The percentage of British exports in world trade declined significantly. - Did the percentage of British exports in world trade decline significantly? - The percentage of British exports in world trade did not decline significantly. Business transactions usually start with enquiries. - Do business transactions usually start with enquiries? - Business transactions usually do not start with enquiries. Investing in infrastructure for industry will encourage economic growth. - Will investing in infrastructure for industry encourage economic growth? - Investing in infrastructure for industry will not encourage economic growth.