Didn't you post this question last year?
Within a month rules out any live animal or human studies. However, you could get some nice data from some cell culture work. Do you have the support of an established lab? If you could access an immortalized oral epithelial cell line that's already up and running (it would take longer than a month to get that started alone), you could measure a number of different responses in the cells, including 'toxicity' reactions to compounds such as mouthwash, composite, amalgam, implant materials, etc. - whatever you have access to that could be considered toxic to the oral epithelium (or reg. epithelium, if that's the only cell line you can get). If you structure the parameters correctly, then you could use a mouthwash or % alcohol solution and correlate the effects of that in some way to alcohol's link to oral cancer.
Just my $0.02
good luck!
p.s. does your school really expect you to design and implement a unique independent project within one month, with no guidance??? Craziness.