試題詳解

45. What is the main idea of this passage?
(A) Runners take part in the marathon race in the hope of experiencing thrilling adventure.
(B) However challenging a marathon can be, runners will make it if they do not give up.
(C) The Marathon of Sands race tests the limits of human endurance.
(D) The Marathon of Sands causes the strong to stumble and the weak to quit.