Exercise3:2.Mark is taller than Ben.2.My hair is curlier than my mum's hair.4.Oliver is more handsome than his brother.5.Our avatar is worse than her avatar. Exercise4:2.Russia is the biggest country in the world.3.Hannah is the most intelligent student in her class.4.Lucy is the best football player in her school.5.We are the worst dancers in our class. Exercise5:2.My friend is lazier than me.3.My hair is longer than my teacher's hair.4.My friend's family is bigger than my family.5.My town is cleaner than another town.