问题 填空题 请在下列名词前加上不定冠词a或an。1. ___________ apple 3. ___________ hour5. ___________ principal7. ___________ egg9. ___________ umbrella2. ___________ flower4. ___________ university student6. ___________ armchair8. ___________ peach10. ___________ policeman 答案 1. an 2. a 3. an 4. a 5. a 6. an 7. an 8. a 9. an 10. a
