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新编英语语法教程第六版 第04讲 练习参考答案Ex. 4A1. come 2. are 3. has / have 4. are 5. are 6. are 7. was / were 8. is 9. costs 10. were 11. are 12. are 13. was 14. are 15. lie 16. were 17. are 18. is 19. is 20. was 21. Has 22. were 23. is 24. is 25. are 26. is 27. are 28. cover, are 29. is / are 30. was/wereEx. 4B1. were 2. have 3. is, is 4. was 5. were 6. is 7. is 8. are 9. is 10. are, are11. have 12. are, their, their 13. was, It, was 14, It / They, is / are 15. are, their, they, disapprove 16. were, they 17. was 18. are 19. were 20. were
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