Sure! Here are the filled-in blanks with the appropriate forms of the adjectives:

The New Orleans Carnival is (1. not/big) **as big as** the carnival in Rio de Janeiro, but it is (2. famous) **the most famous** carnival in the USA. It is (3. colourful) **more colourful than** the carnival in Rio de Janeiro and it is (4. exciting) **the most exciting** event in New Orleans every year. The weather in New Orleans is (5. not/good) **not as good as** that in Rio de Janeiro, but people are (6. friendly) **friendlier**. The carnival season lasts for two weeks, but (7. busy) **the busiest** time is the last five days. The carnival is (8. big) **bigger** and (9. exciting) **more exciting** than ever during these five days. It is (10. good) **the best** time to visit New Orleans!