Пять типов вопросов к предложению Mark and Den have already bought these books.

Question

Пять типов вопросов к предложению Mark and Den have already bought these books.

Answer 1

Have Mark and Den bought these books yet?
Who has bought these books?
What have Mark and Den bought ?
Mark and Den have already bought these books,haven't they?
Have Mark and Den bought these books or those magazines?