Copy & Paste Questions between quizzes

Hello! Unfortunately, I didn’t see a way to copy and paste questions between two quizzes. The reason: I offer several quizzes on the same topic, just with a different number of questions (All, 20, 50, 70). But the questions are all from the same pool.

I didn’t find an “Export Questions” function either, or is that available with Watu Pro?

Thanks very much!