Here are the answers for the pronunciation question and mistake identification from the document:

**Part I: Choose the correct answer A, B, C, or D whose underlined part is pronounced differently from the others.**
1. A. bought
2. C. raised
3. C. fairly
4. B. sure
5. A. flood
6. C. smooth

**Part III: Each of the following sentences has one mistake. Identify the mistake by writing the letter A, B, C, or D on the answer sheet.**
1. B — "the audience had gone home before it ended"
2. D — "I was an interesting that couldn't sleep until I finished it"
3. C — "We haven't visited our grandparents when they moved to their house"
4. D — "I'm going to visit Hue tomorrow"

Let me know if you need further assistance!