问题 填空题 在下列名词前填上a或an。1. ____________ egg3. ____________ school5. ____________ book7. ____________ apple9. ____________ Ss11. ____________ umbrella2. ____________ cat4. ____________ orange6. ____________ hour8. ____________ car10. ____________ Uu12. ____________ pupil 答案 1. an 2. a 3. a 4. an 5. a 6. an 7. an 8. a 9. an 10. a 11. an 12. a