Looking for a place to stay in Cambridge

Hi! I'm a PhD student. I'll be in Cambridge from 1st of March to 1st of July doing a research stay at the Department of Medicine of the Cambridge Institute of Therapeutic Immunology and Infectious Disease, in Addenbrooke's Hospital. I need a place to stay during those 4 months. I'm looking for a single occupancy room, preferably with an ensuite and located in the city centre.
I'm a quiet, respectful, clean and tidy person. I'll be working most of the time but I also like to socialize