（1）When did the HZMB open？
A.On 24th，October.
B.On 24th，December.
C.On 14th，December.
（2）What does the HZMB look like？
A.The letter "L".
B.The letter "Y".
C.The letter "I".
（3）How long does it take China to build the HZMB？
A.Nine years.
B.Fifty-five months.
C.Seven years.
（4）How far is it from Hong Kong to Zhuhai with the the HZMB now？
A.45 minutes' ride.
B.1 hour's ride.
C.4 hours' ride.
（5）Where can you see the Chinese White Dolphins when crossing the HZMB？
A.In Yangtze River.
B.In Yellow River.
C.In Lingdingyang Bay.