9 Correct the mistakes. 1 This is the better program on TV! 2 Paris is most beautiful than London. 3 Russia is the colder than Spain. 4 I eat less of you. 5 My schoolbag is heaviest than yours.

Here are the corrected sentences: 1. This is the best program on TV! _Explanation_: When comparing something to all others in its category, we use the superlative form, which is "best". 2. Paris is more beautiful than London. _Explanation_: For longer adjectives (more than one syllable), we use "more" to form the comparative. 3. Russia is colder than Spain. _Explanation_: For short adjectives (one syllable), we add "-er" to form the comparative. 4. I eat less than you. _Explanation_: The phrase is "less than," not "less of." 5. My schoolbag is heavier than yours. _Explanation_: The correct comparative form of "heavy" is "heavier". Also, we are comparing two schoolbags, therefore the comparative adjective is needed instead of the superlative.