Hi beekline,
I am international student with poor GRE verbal too
On my SOP, I wrote my rural development internship during undergraduate and I elaborate it with my current working experience. IMHO, MPA DP more into practical learning (internship projects here and there), thus, the admission officer might consider practical experience as well. CMIIW.
I don't know whether you once have hands on experience during your college time or doing field monitoring for your research. If you have any, I think you should try to write them on your SOP.
Good luck for you