完形填空。 Mr. Green is 1___________ Englishman. He is a teacher. He 2___________ English in No. 10 Middle School 3___________Beijing. He likes 4___________ a lot. He goes to work 5___________ bus every morning. There are fifty students in his class. He speaks English 6___________ them in class. He plays games with them after class. He likes 7___________ very much and his students love him, too. They are good friends. (     ) 1. A. a (     ) 2. A. teach (     ) 3. A. on (     ) 4. A. teaching (     ) 5. A. on (     ) 6. A. with (     ) 7. A. them B. the B. teaches B. at B. teach B. by B. to B. they C. an C. teaching C. in C. teaches C. in C. on C. their