what would you do?

so for my history 101 class we have a major paper due tomorrow. we were given partners to work with and were suppose to each write a paper and take bits and pieces from each and form one paper that is a combination of the two. i have been emailing my partner non stop and have not got a single response from him. i am guessing he is just assuming i will write the paper and we will just use my version. should i let him take any credit for this paper or just flat out tell my professor that he did not put in a single minute of time into this paper?