聽材料，回答下列各題。
（1）What is special about this bridge？
A.It goes through China's longest tunnel.
B.It's the world's longest cross-sea bridge.
C.It's above the Pearl River Delta.
（2）How long did it take to build the bridge？
A.20 years.
B.9 years.
C.3 years.
（3）How much did it cost to construct the bridge？
A.6.7 billion yuan.
B.55 billion yuan.
C.120 billion yuan.
（4）How long does it take to travel between Zhuhai and Hong Kong using this bridge？
A.Half an hour.
B.An hour.
C.Three hours.