Some tour buses that take you around the highlights let you hop on and off, wherever and as often as you like, all on one ticket, for a period of up to 48 hours.
for all the tours, you must remain on the bus at all times.
mnli hypothesis: for all the tours, you must remain on the bus at all times. premise: Some tour buses that take you around the highlights let you hop on and off, wherever and as often as you like, all on one ticket, for a period of up to 48 hours.