完形填空。 I'm Susan White. I am 1 American. I'm a new student 2 Hong Xing Middle School. I'm in Class Fifteen, 3 . My teacher is 4 I have two friends here. They 5 . They are 6 . We are 7 in 8 school. Li Ping is 9 this morning. He helps the teacher put books, pictures 10 her room. He is a good boy. (     )1. A. a (     )2. A. in (     )3. A. One Grade (     )4. A. Miss yang (     )5. A. English (     )6. A. twin (     )7. A. all (     )8. A. same (     )9. A. on duty (     )10. A. to B. one B. on B. grade 1 B. Mr Jeff B. are twelve B. twin sisters B. everyone B. an B. in duty B. in C. the C. to C. Grade One C. Miss Ann C. good C. twins sisters C. both C. the same C. duty C. like D. / D. for D. Grade one D. Mr King D. twelve D. twin sister D. too D. good D. to duty D. for