完形填空。 Mingming is the 1 student in our class. His father is a 2 in a factory. His mother is a teacher. He 3 a sister and a brother. His sister is 4 younger than him. But she is much 5 than Mingming. His brother is 6 . Mingming studies very 7 . He usually gets up 8 a quarter past six in the morning. After breakfast, he leaves home. He goes to 9 by bike. He often gets there earlier than others. He likes 10 his classmates with their lessons. (     ) 1. A. good (     ) 2. A. farmer (     ) 3. A. is (     ) 4. A. a little (     ) 5. A. younger (     ) 6. A. young (     ) 7. A. busy (     ) 8. A. in (     ) 9. A. school (     ) 10. A. to work B. better B. worker B. have B. more B. older B. younger B. hard B. on B. home B. to make C. best C. teacher C. likes C. very C. stronger C. older C. good C. at C. factory C. to write D. nice D. student D. has D. quite D. more D. the youngest D. fine D. to D. farm D. to help