Egmat exams need OG 2018, VR 2018, OG 2019 and OGVR 2019 questions

Hi,

I am using Egmat course for verbal and in the OG quiz there are OG questions but doesn't have options , I don't have the 4 guides they mentioned.

Should we buy these ? Since it would be very expensive. Also how do i work on these questions without knowing the questions and answer?

Thanks