1greenhouse effect is one of the biggest problem.
2Peter is the fastest student in our faculty.
3The Pluto is the smallest planet in our star system .
4The highest skyscraper of the world is placed in Dubai.
5Robert is happier today than he was yesterday.
6Health is more important than money.
7My sister's cooking is worse than your sister's cooking.
8Katie is the tallest of all my friends.
9Rob is older than John.
10My hair is longer than your hair.
