【答案】5. Why does the Resonant Sand Gorge sing song according to the legend?

题目：5.WhydoestheResonantSandGorgesingsongaccordingtothelegend?
A、Alegendsaidtheburiedlamasstillperformedtheirdutiestochantanddance.

B、Animmortaltraveledhereandblewthebugletogetridofthetiredness.Thebeautifulmelodieswormintothegapsofthesands.

C、BothAandB.

标准答案：C