完形填空。 One day John and Bill were fishing. John took his 1 Black with him on the riverbank. When the dog saw a bird, he would run 2 it and try to 3 it. 'All the fish are afraid and 4 away,' said Bill. 'Be quiet, Black.'John shouted at the dog, 5 Black did not listen to him. 'Shall we go now, Bill?' asked John, 'next time I shall not bring him here 6 .' 'Wait,' said Bill. 'A fish is biting my line.' 'Be careful!'shouted John. But it was too 7 . The boy fell into the water. 'Help! Help!'Bill shouted. But John couldn't swim, either. 8 Black came out. He jumped into the water and 9 the boy onto the bank and 10 his life. (     )1. A. fish (     )2. A. into (     )3. A. smell (     )4. A. walk (     )5. A. and (     )6. A. too (     )7. A. late (     )8. A. Some times (     )9. A. saw (     )10. A. gave B. dog B. onto B. play B. swim B. or B. either B. dangerous B. At times B. tried to help B. made C. cat C. away C. catch C. fly C. but C. again C. fast C. Since then C. pulled C. came to D. friend D. after D. shout D. run D. so D. also D. safe D. Just then D. swam together D. saved