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BIBLIOGRAPHY

UNAD (2017) Campus virtual - Advanced English II, Knowledge Environment Unit 2 - [En

Linea] available in: http://campus36.unad.edu.co/ecedu13/course/view.php?id=207

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Grammar Level IVA INDIRECT AND DIRECT REQUESTS. (n.d.). Retrieved January 30,
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Grammar and Beyond Level 2 Student's Book and Workbook (pp. 254-265). (2011).
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Mendoza, D. (2017, February 01).551014_Unit 2. Repositorio UNAD. Retrieved February
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Requests with modals, If clauses and gerunds. Retrieved January 30. 2017 from:
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What Is a Relative Pronoun? Examples & Exercises. Ginger Pages. Retrieved 29, 2017,
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