You have to submit documents to prove continuous presence besides copies of passport and i94 . You can submit bank statements, phone bill, rent lease agreement (provided they all have your name in it.) from june till now. so any monthly statements, more official Is better. If you can' t submit any of those, submit your husbands rent lease/utility bill and letter from him stating you have been continuously living with him in the above address from such and such date.

All the best