完形填空 Here is a story about a clever dog.  It. was a guide dog. A guide dog can help blind people walk along the streets and do many other things. One day a guide dog and a blind man 1 on a bus together. The bus was 2 of people and there were 3 vacant (空的)  seats. Soon one man stood up and left his seat. The dog 4 the blind man to the seat, but there was 5 space for both of them. The dog began to push the people on each side with his nose. He pushed and pushed 6 the people moved and finally there was enough space for 7 people. The blind man then sat down and the 8 got up on the seat at his side. The dog lay down and put his head on the blind man's lap. He was very comfortable and soon fell a sleep. Every one on the 9 couldn't help 10 at the dog. (     )1. A. got (     )2. A. 1ell (     )3. A. no (     )4. A. told (     )5. A. a few (     )6. A. up to now (     )7. A. many (     )8. A. dog (     )9. A. seat (     )10.A. smile B. went B. fill B. some B. asked B. not any B. up till now B. two B. people B. floor B. smiles C. took C. full C. several C. letting C. not enough C. until C. few C. man C. car C. smiling D. had D. feel D. many D. took D. not enough of D. to the finally D. one D. woman D. bus D. a smile