A、They will build some huge walls to walk on. B、They will build gates in the sea to keep water out. C、They will build some roads

Venice is the "Queen" of the Adriatic Sea. Every year thousands of people from all over the world travel to Italy to visit the city. Do you know why they like to go there for a visit?
    Venice is a very beautiful city. It is quite different from other cities in the world. There aren’t any roads or streets in the city so there aren’t any cars or buses. There are many canals in the city. There is one big canal and one hundred and seventy-seven small canals. People move up and down the canals in boats to go to work, go shopping or visit their friends.
    But Venice is sinking. It is going down and the water is going up. In 2040 Venice will be under water. The Adriatic Sea will cover the city. The Venetians love their city and they want to stay there, so they want to save Venice from the sea. They do not want to leave. How can they save Venice? They can build some strong huge walls and gates in the sea. The gates will close to keep too much water out. Thus Venice will not sink.