----- Nội dung ảnh ----- Exercise 9: Underline the mistake and rewrite the correct one. 1. The more complicated the puzzle gets, the long it takes to solve. 2. The most polluted the air gets, the harder it is to breathe. 3. Despite the crowded streets, Tom decided to get up downtown by motorbike. 4. We had to cancel our trip because our dad came up with the flu. 5. The cleaner the kitchen is, more inviting it looks.