PPSC Assistant in Disaster Management Department (Board of Revenue), English MCQs, Grammar, PPSC Solved Past Papers MCQsI know he is slow ____ understanding, but you have to be patient with him. Posted on July 25, 2021 by adminA. On B. At C. To D. FromShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)