Question

a) Tuba said I have bought book coples and pen. (add preposition)​

Answer 1

Answer:

tuba said that he had brought book coples and pen.

Answer 2

Answer:

a) Tuba said," I have bought book coples and pen."

---------> Tuba said that he had bought book, copies and pen.

Explanation:

I just changed the narration of the question.

Hope it will help you.