For further study of part-writing in a 4-part texture, see:
Kostka, Stephan and Dorothy Payne. Tonal Harmony: With an Introduction to Twentieth-Century Music. 5th edition. McGraw-Hill, 2004. There is an accompanying workbook that could prove helpful in preparing for the exam, and includes 2 CD’s worth of audio recordings of the musical examples in the workbook. The main text itself also has many “self-tests” with answers in the back. Questions 1-5 examine various issues of part-writing in a 4-part texture. This is discussed throughout many chapters in the Kostka text, especially chapters 6, 8, 9, and 13.
Suggestions for Specific Questions:
1) Chapter 13
2) Chapter 6
3) Chapter 6
4) Chapter 6
5) Chapters 6 and 13