Xi.дайте следующие предложения в отрицательной и вопросительной форме: 1)there is a telephone in my room. 2)there are offers and letters on my desk. 3)there is a computer on our secretary's desk. 4)there are many books and business journals in our library. 5)there are a lot of newspapers and magazines on the sofa.
There aren't offers and letters on my desk.Are there offers and letters on my desk?
Дальше по такому же принципу.