Here are the answers for each section:

**V. Choose the word that has different stress from the others:**

1. **A. scientist**
2. **A. national**
3. **A. prehistoric**
4. **B. hospital**
5. **B. horrific**
6. **A. arithmetic**
7. **C. geographic**
8. **B. classical**
9. **B. historic**
10. **B. pollute**
11. **A. affect**
12. **A. cholera**
13. **A. radiation**
14. **A. seriously**
15. **A. aquatic**

**VI. Choose a word whose main stress pattern is the same as that of the others:**

1. **A. ecology**
2. **B. alternatively**
3. **B. geology**
4. **A. apology**
5. **C. logical**

6. **B. physical**
7. **A. charity**
8. **C. considerable**
9. **A. celebrate**
10. **A. tradition**
11. **A. industry**
12. **B. rename**
13. **B. bibliographic**
14. **B. nature**
15. **D. preparation**
16. **C. scientific**
17. **D. volcano**
18. **A. classical**

Let me know if you need any further assistance!