Question

Поставьте вопросы к выделенным словам.
1. There are two computers in the office. 2. This is a new printer.
3. It is three miles to the shop. 4. There is a mistake in the text.
5. They are famous detectives. 6. It’s Mary’s book. 7. It’s Sunday
today. 8. He is in Paris now. 9. Mr. Parker is my teacher. 10. He
is a lawyer. 11. This is an important question. 12. They are
artists. 13. Marina is a secretary. 14. Henry is twenty years old.
15. This is a colour printer

Answer 1

Are there two computers....?.2. Is this a new printer? 3. Is it there miles to the shop. 4. Is there a mistake in the text. 
короче здесь глагол быть To be ( Am, is, are). чтобы сделать их вопросительным  перевиде их в началу предложения и предложение становится вопросительным.