You dont need past papers to solve and consume your time.
You should keep brushing up from your notes, try to solve some examples for practice and just simply revise them for internals. Try to note down important stuff for remembering.

Make sure you're confident, calm and relaxed to give your best shot.
Kindly refer below link for reference examples asked in exams.

http://www.bms.co.in/fybms-sem-1-syllabus-business-communication/

http://www.allonlinefree.com/business-communication-notes-pdf/

All the Best for exams.