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冠词用法讲练 EXERCISE 1 A. 1. a 2. an 3. an 4. an 5. an 6. an 7. a 8. an B. 1. a new office building 2. travel agent 3. an American scientist 4. a days outing 5. an Indian stamp 6. a heart attack 7. an advanced country 8. an interesting play EXERCISE 2 1. A ; a 2.x; x; x 3. a; a; an; a 4.a; a; a; an 5. a; a; a; a; a 6.an; a; x; an; x; a; a 7. a; an 8.x EXERCISE 3 A. 1. a ; a 2. an 3. a 4. a ; a ; a 5. an 6. a ; a 7. a ; a 8. an 9. a 10.a B. 1. a ; a 2. a ; a 3. a 4. a 5. an 6. a 7. a 8. a 9. a 10. a EXERCISE 4 1. the; x 2. x; The 3. x; The 4. The ; x 7. x; the 8. the; x EXERCISE 5 A. 1.x; a; the 2. The ; the | 
