Поставьте предложения в вопросительную и отрицательную формы.
1.There are thousands of opportunities to build careers.
2.Video game sales are sky rocketing at the moment
3. In the 19th century Britain dominated international trade..

1.There aren't thousands of opportunities to build careers.
Are there thousands of opportunities to build careers?
2. Video game sales aren't sky rocketing at the moment
Are video game sales sky rocketing at the moment?
3. In the 19th century Britain didn't dominate international trade..
Did Britain dominate international trade in the 19th century ?