Let's analyze the questions step by step:

### II. Mark the letter A, B, C, or D:

1. A. **homeless** (main stress on "home")
B. **provide** (main stress on "vide")
C. **adopt** (main stress on "adopt")
D. **donate** (main stress on "do")
**Different word:** **B** (provide)

2. A. **reduce** (main stress on "duce")
B. **rubbish** (main stress on "rub")
C. **plastic** (main stress on "plas")
D. **idol** (main stress on "i")
**Different word:** **D** (idol)

3. A. **become** (main stress on "come")
B. **release** (main stress on "lease")
C. **perform** (main stress on "form")
D. **artist** (main stress on "art")
**Different word:** **D** (artist)

4. A. **talent** (main stress on "tal")
B. **theatre** (main stress on "thea")
C. **enjoy** (main stress on "joy")
D. **donate** (main stress on "do")
**Different word:** **C** (enjoy)

5. A. **music** (main stress on "mu")
B. **movie** (main stress on "mo")
C. **perform** (main stress on "form")
D. **famous** (main stress on "fa")
**Different word:** **C** (perform)

### III. Mark the letter A, B, C, or D (based on pronunciation):
1. A. **humans** (stress on "hu")
B. **dreams** (stress on "dreams")
C. **laughs** (stress on "laughs")
D. **oranges** (stress on "or")
**Different word:** **A** (humans)

2. A. **dishes** (stress on "dishes")
B. **adds** (stress on "adds")
C. **books** (stress on "books")
D. **answered** (stress on "swered")
**Different word:** **D** (answered)

3. A. **wants** (stress on "wants")
B. **approved** (stress on "proved")
C. **managed** (stress on "man")
D. **washed** (stress on "washed")
**Different word:** **B** (approved)

4. A. **laughed** (stress on "laughed")
B. **exchanged** (stress on "changed")
C. **started** (stress on "start")
D. **added** (stress on "ad")
**Different word:** **C** (started)

### IV. Mark the letter A, B, C, or D:
1. The answer is **C. Servant**.

Summary of differing words:
- 1: B
- 2: D
- 3: D
- 4: C
- 5: C
- III. 1: A
- 2: D
- 3: B
- 4: C
- IV: C

Let me know if you need further assistance!