2. A block of flats is taller than a villa. A block of flats isn’t as tall as a villa
3.The city center is noisier than the suburbs. The city center isn’t as noisy as the suburbs
4. A cottage is smaller than a bungalow. A cottage isn’t as smaller as a bungalow
5.Houses are more expensive than flats. Houses aren’t as expensive as flats.
6. Cities are more crowded than villages. Cities aren’t as crowded as villages
7. The suburbs are more beautiful than the city centre. The suburbs aren’t as beautiful as the city centre.