1. This dress is the most expensive of three dresses. (expensive)

2. Vietnamese students work fewer hours than American students. (few)

3. He has more money than his wife. (much)

4. Summer holiday is longer than Tet holiday. It's the longest holiday (long)

5. Tom is more intelligent than Peter (intelligent)

6. My father drinks less beer than his friends (little)

7. Your watch is better than my watch (good)

8. Nam is the tallest in his class (tall)

9. Ho Chi Minh city is bigger than Ha Noi (big)

10. Her English is better than my English (good)

11. Winter is the coldest season in the year (cold)