17. My bedroom is ....... room in my house.
A. tidier than B. the tidiest C. the most tidy D. more tidier
18. This road is ....... than that road.
A. narrower B. narrow C. the most narrow D. more narrower
19. He drives ……. his brother.
A. more careful than B. more carefully C. more carefully than D. as careful as
20. It was ....... day of the year.
A. the colder B. the coldest C. coldest D. colder