Помогите поставить прилагательные в скобках в правильную форму. This sentence is...

Question

Помогите поставить прилагательные в скобках в правильную форму.
This sentence is (difficult) than the first one.
February is (cold) than March.
Which is the (high) mountain in the world?
John Williams is (young) than me.
This present is the (good) of all.
Your composition was the (bad) in the class.
Lake Baikal is (deep) than this lake.
Peter is (tall) than Boris.

Answer 1

This sentence is more difficult than the first one.
February is colder than March.
Which is the highest mountain in the world?
John Williams is younger than me.
This present is the best of all.
Your composition was the worst in the class.
Lake Baikal is deeper than this lake.
Peter is taller than Boris.