Hello student I'm sorry to inform you but as of now we do not have the guess paper of Bihar board in Hindi/English. You can buy it from your local book store or you may also download the model paper of Bihar board from its official website it's released by bihar board itself.

Link is mentioned below :-

http://biharboardonline.bihar.gov.in/nodeaddpage-0

Feel free to comment if you have any doubt

Good luck