Поставьте предложения в вопросительную и отрицательную формы. 1.There are thousands of opportunities to build careers.

1.There are thousands of opportunities to build careers. - There aren\'t thousands of opportunities to build a career. - Are there thousands of opportunities to build careers.

2.Video game sales are sky rocketing at the moment. - Video game sales are not sky rocketing at the moment. - Are video game sales sky rocketing at the moment?

3. In the 19th century Britain dominated international trade. - In the 19th century Britain didn\'t dominate international trade. - Did Britain dominate international trade in the 19th century?