完形填空。 One day, two friends were walking through the desert.-- 1 the journey they had a quarrel, and one friend hit 2 one in the face. The one who was hit was hurt, 3 he didn't say anything. Instead, he wrote in the sand, 'Today my best friend hit me in the face.' They kept on 4 until they found an oasis (绿洲).They decided to get some water. The one who had been hit fell into the mire (泥潭) and was in danger, but the friend 5 him. When he felt all right, he wrote on 6 .'Today my best friend saved my life.' The one who had hit and saved his best friend asked him,'After I 7 you, you wrote in the sand and now you write on a stone. 8 ' The other friend replied, 'When someone hurts us, we should write it down in sand where winds of forgiveness (宽恕) can blow 9 away. Bt when someone does something 10 for us, we must write it in stone where no wind can ever blow it away.' (     )1. A. After (     )2. A. some (     )3. A. and (     )4. A. walking (     )5. A. hurt (     )6. A. the desert (     )7. A. killed (     )8. A. When (     )9. A. it (     )10.A. interesting B. During B. each B. so B. jumping B. left B. a stone B. helped B. What B. these B. good C. For C. another C. but C. singing C. hit C. a tree C. hurt C. How C. them C. dangerous D. Before D. the other D. or D. running D. saved D. the sand D. quarreled with D. Why D. this D. harmful