Chapter 1 Principles of English Writing����Unit 1 Word Choice����Unit 2 Sentence Effectiveness����Unit 3 Paragraph DevelopmentChapter 2 Social Letters�� Unit 4 Invitations����Unit 5 Thank-you Letters����Unit 6 Apologies����Unit 7 Congratulations����Unit 8 Application����Unit 9 Résumé����Unit 10 RecommendationChapter 3 Business Correspondence����Unit 11 Requests and InquiriesChapter 1 Principles of English Writing����Unit 1 Word Choice����Unit 2 Sentence Effectiveness����Unit 3 Paragraph DevelopmentChapter 2 Social Letters�� Unit 4 Invitations����Unit 5 Thank-you Letters����Unit 6 Apologies����Unit 7 Congratulations����Unit 8 Application����Unit 9 Résumé����Unit 10 RecommendationChapter 3 Business Correspondence����Unit 11 Requests and Inquiries����Unit 12 Orders����Unit 13 Complaints Unit 14 Appreciation����Unit 15 RefusalChapter 4 Research Paper����Unit 16 Introduce the Study����Unit 17 Develop Literature Review����Unit 18 State the Methodology����Unit 19 Present Results and Findings����Unit 20 Compose Discussion/Conclusion����Unit 21 Write the AbstractReference Answers