Исправить ошибку в употребление степени сравнения прилогательных ...

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Исправить ошибку в употребление степени сравнения прилогательных
Find and correct mistakes in the forms of the adjectives
1.London is more old than New York.
2.This exercise is more difficult than that one.
3.The boy is as taller as his father.
4. Baseball is the popularest summer sport in America.
5.It’s the most sharp pencil I have.