题目

I never thought I would be a runner． I was the girl who_______slowest in the PE class． A few years ago， I was walking with a group of_______in the Race for the Cure， a 5km race designed to_______money for the fight against breast cancer（癌），_______one lady caught my_______．She was one of the weakest-looking women I've ever seen． She must have been close to seventy years old，_______a T-shirt with the word Survivor． She was so small that it seemed as if she could even be_______by a strong wind． But， she was running． And she was_______me and my group of friends． She____________ a bike is exercise.        A. Ride             B. Riding           C. Rideing