please tell me, what is right,

1 I write on the book


2 I write in the book
It depends on where you're doing your writing! If I leave the book closed and write on its cover, then I write on the book. If I open the book and write on one of the pages, then I write in the book.
I have problem in Pronunciation please help me in this regard.
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Hello Ahmadmasood,

You'd better repost this question to Speech and Pronunciation section, and begin a new thread there. If your question is directed to a specific pronunciation problems, you will get better answers. I'd be happy to help you.