Write the comparative or superlative form of the adjective in brackets.Example: This is the most exciting (exciting) book I’ve ever read. I can’t stop reading it!1 Sarah works _________ (hard) than Michael. He has too many breaks!2 Harry’s _________ (friendly) person I know. He talks to everybody!3 Russia is _________ (big) country in the world.4 It was _________ (bad) dream I’ve ever had. I was really frightened.5 Peter is _________ (generous) than Joe – he always pays for the drinks!6 His trainers were _________ (expensive) than mine. I got mine in the sale.