Here's what you could do:
For every correct answer do this:
Code:
Button WK?? clicked
+ correct_street_name is in play area
->Destroy that streetname
Now give all WK buttons the same qualifier. I used the 'good' qualifier (the little apple).
Make an event 'if good-qualifier is clicked' -> move all streetnames back to the pick-zone.
Code:
Button 'good'-qualifier clicked
-> Set position at (57,-220)
-> Set position at (57,-220)
-> Set position at (57,-220)
-> Set position at (57,-220)
-> Set position at (57,-220)
-> Set position at (57,-220)
-> ... do this for all streetnames
This covers all wrong ones.
Here's a screenshot I took to clarify: