Task 1
1. Her dress is prettier than mine.
2. Cheetahs are the fastest animals we can find.
3. Eating fruit and vegetables is healthier than eating hot dogs.
4. I like milk better than coffee.
5. China has more people than any other country in the world.
Task 2
1. The blue whale is the heaviest animal in the world.
2. Which is bigger, Portugal or Spain?
3. Travelling by plane is more comfortable than travelling by car.
4. He is the tallest person in the class.
5. Buying things from plastic is worse than buying things from recycled paper.
Объяснение:
1 don't they
2 doesn't he
3 haven't you
4 has she
5 shall we
6 does it
7 don't we
8 are there
9 is there
10 aren't I
11 am I
12 aren't they