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Respuestas a la pregunta
Respuesta:
1. C . 1. there is . 1. a , any
2. U 2. there are 2. any
3. U 3. there are 3. some
4. U 4. there isn't . 4. an
5. U 5. there are 5. a
6. C 6. there is
7. U 7. there aren't
8. U 8. there is
11. C 9. there aren't
12. U 10. there isn't
13. C
14. U
15. C
16. U
17. U
18. C
Explicación: