Ответ:

2. Football is the most popular in Europe.

3. My cat is more intelligent than my dog.

4. Playing chess is more difficult than playing monopoly.

5. Drinking water is healthier than drinking Coke.

6. What's the fastest animal you know?

7. My handwriting is more beautiful than my brother's.

8. My mother is the most beautiful woman in the world.

9. China is the most populated country in the world.

Ответ:

2) the most popular

3) more intelligent than

4) more difficult than

5) healthier than

6) the fastest

7) more beautiful than

8) the most beautiful

9) the most populated