I just saw the discussion here: https://moodle.org/mod/forum/discuss.php?d=231180
If some kind of sequence of variants were available, this would perfectly suit my needs. The use of cloze question type is also proposed. I suppose that I could generate the syntax for several (i.e., 200) cloze questions, each related to a different dataset. However, this forces the student to answer all the questions before submitting the page. Therefore, students might lose their answers if they accidentally close their browser.
Thanks for your answers.