Castles were often on the top of hills or rocks - правильное, а castles were often near hills or rocks - неправильное. Many castles had thin walls and big windows - неправильное, many castles had thick walls and small windows. People used a boat to cross the moat - неправильное, а people used a drawbridge to cross the moat - правильное. Sometimes the lord and lady performed shows - неправильное, а sometimes musicians and acrobats visited the castle and performed shows - правильное. People usually collected their rubbish - неправильное, а people usually dropped rubbish in the moat.
