阅读下文短文, 从所给的四个选项中, 选出最佳答案。

    Venice (威尼斯) is a city of the sea. It is built on islands which are in the middle of a lagoon (环礁湖) . Today, the city covers 118　　 islands. These islands are connected by bridges. There are about 400　　 bridges which cross 150 canals. It is difficult to forget the sea when you are in the city.

    The people of Venice have always been fishermen, because the lagoon was full of fish. They also built ships, and travelled to Dalmatia (Yugoslavia), Byzantium (Istanbul) and Greece.

    Venice is the "Queen" of the Adriatic Sea. Every year thousands of people visit the city. Because Venice is a beautiful city. But Venice　　 is sinking. It is going down and the water is going up. In 2040 Venice　　 will be under water. The Adriatic will cover the city. The Venetians (威尼斯人) love their city and they want to stay there. They want to　　 rescue (挽救) Venice. They do not want to leave. How can they succeed? They can put some huge gates in the sea, which will close, so Venice　　 will not sink.

   1. The city is made up of_________.　　　　　　　　　　   ［　　］　　　　   　　 A. 400 bridges　　　　　　  B. 150 canals 　　 C. 118 islands　　　　　　  D. a lagoon   2. The main difference between Venice and most other cities in the  　　 world is___________.　　　　　　　　　　　　　　　　  ［　　］  　　 A. that Venice is bigger 　　 B. that every year thousands of people visit Venice 　　 C. that Venice is a very beautiful city 　　 D. that Venice is a city of the sea   3. The Venetians make a living mainly on________.　　　　［　　］　　　　 　　 A. fish　　　　　　B. fishing 　　 C. ships　　　　   D. building ships   4. People call Venice the "Queen" of the Adriatic Sea because______. 　　　　　　　　　　　　　　　　　　　　　　　　　　　　   ［　　］ 　　 A. the queen or the country lives there 　　 B. the Venetians love their city 　　 C. it is a beautiful city 　　 D. it is sinking   5. The Venetians________.　　　　　　　　　　　　　　　　［　　］  　　 A. want to leave Venice  　　 B. do not like their city 　　 C. want to save their city from the sea 　　 D. do not want to stay there   6. From this passage we know that________.　　　　　　   ［　　］   　　 A. there are a lot of bridges in the city 　　 B. the city is in danger because it is sinking 　　 C. the people of Venice try to stop their city from sinking 　　 D. A. B. and C