听一段材料，回答下面几个小题。
.What is the distance of the torch relay in Wuhan?
A.20.7 kilometers.
B.42.5 kilometers.
C.63.2 kilometers.
Why were all the stage performances during the launching and closing ceremonies called off for the torch relay in Wuhan?
A.Because of the bad weather.
B.Because of the limit to time.
C.Because of mourning for the victims of the devastating earthquake in Wenchuan.
When was Yellow Crane Tower built?
A.The Tang Dynasty.
B.The Song Dynasty.
C.The Three Kingdoms period.