A lot of mock exams contain drag and drop questions (like inquisition,
examlab etc). You can practice those questions in them. Drag and drop questions are not too tricky. You just need to carefully read all the dragable options correctly. Also in the exam, once you answer a drag and drop question, and if you come back to that questions to review it, the answer gets reset, so try to answer them in the first pass and leave them as they are after that...