Viết lại các câu sau

21. The black dress is more expensive than the white one.

=> The white dress

22. According to me, English is easier than Maths.
=> According to me, Maths

23. No one in my group is more intelligent than Mary.
=> Mary

24. No river in the world is longer than the Nile.
=> The Nile

25. Mount Everest is the highest mountain in the world.
=> No mountain

26. This is the first time I have ever met such a pretty girl.
=> She is