语法填空。 It was a very cold evening, an old man was waiting for a ride across the river. He saw several horsemen pass by but he didn't ask for any help. The wait seemed 1______ (end). Then came another rider, the old man 2______ (catch) his eye and said, "Sir, would you mind doing me a favor?" Stopping his horse, he replied, "Of course." Almost 3______ (freeze), the old man could not get 4______ the ground. The horseman helped him onto his horse. He took the old man not just across the river, 5______to his home. "Sir, you didn't even ask the other riders for help, why? What 6______ I had said 'no' and left you there?"the horseman asked. The old man looked at him straight in the eyes and said, "I looked into their eyes, I found they didn't care,7______ told me it would be useless, but when I looked into 8______, I saw kindness." These words touched the rider deeply. "Thank you for 9______ you've said, I hope l will never be too busy to help others." With that, Thomas Jefferson, the 10______ (three) president of the US, turned his horsearound and went away.