Problem about TOEIC quizs

I want to start a website of TOIEC quizs. But there is a problem if you can solve. Maybe you know, in the part 3 and part 4 of TOIEC test, each audio has 3 questions that the student has to check. So that,I want to display 3 questions each time, after the students have finished 3 questions/audio, they click “next button”, and then they see 3 others/audio then hear audio and check, and continue so.

So that, I think maybe you can add one more function that is called “display number of questions each time : 3 “.What a shame, I know nothing about coding, I can’t make that clear. But I really like your wonderful very helpful plugin.

P/s: It’s better, if it has subclass or level class in each quiz.. kind of, the question A has 3 questions a, and in question a has few questions x,y,z… Silly me! ??

Thanks,

https://www.ads-software.com/plugins/wp-pro-quiz/