Thanks a lot.
Since 'Beware of slippery floor' is posted on the wall. I would say:
Mind the slippery floor. Am I right?
For this announcement 'Please queue up for the next available service counter.' I think it means there are at least two counters and people will wait in line, so if one is busy, people can go to another counter. I don't know how to change it to mean that. Or just simply 'Please line up here for a service counter.'??
For the last one: 'Smoking is prohibited in toilet cubicals.' This is posted on the wall in the toilet.
Student or Learner