A、Water. B、Hills. C、Flat land. D、Tall buildings. D

San Francisco has been called one of the most beautiful cities in the world. It is built on 14 hills with the Pacitic Ocean on one side and near the San Francisco Bay on the other. Each hill has a view over the water. San Franciscans are proud of their views. Everyone wants a house with a view. Most big cities in the United States are built on flat land. People can’t see very far. They can only see tall buildings. When they choose their homes they look inside. They want a house with pleasant rooms to look at. When San Franciscans choose their homes, they look outside. They want a house with a view.