Here are the answers for each section based on the pronunciation and stress patterns:

**IV. Choose the word whose underlined part is pronounced differently from that of the others:**

1. A. sugar - B. shooting - **C. cheap** - D. machine
(C. "cheap" has a different vowel sound)

2. A. blood - B. pool - **C. food** - D. tool
(C. "food" has a different vowel sound)

3. A. concerned - B. received - **C. attached** - D. concealed
(C. "attached" has a different vowel sound)

4. A. teacher - B. clear - **C. reason** - D. native
(C. "reason" has a different vowel sound)

5. A. natural - B. nature - **C. advise** - D. explanation
(C. "advise" has a different vowel sound)

6. A. desire - B. promising - **C. advise** - D. explanation
(C. "advise" has a different vowel sound)

7. A. books - B. maps - **C. pilots** - D. cars
(C. "pilots" has a different vowel sound)

8. A. honest - B. hours - **C. home** - D. vehicle
(C. "home" has a different vowel sound)

9. A. broaden - B. alone - **C. coal** - D. thanks
(C. "coal" has a different vowel sound)

10. A. although - B. these - **C. thanks** - D. without
(C. "thanks" has a different vowel sound)


**V. Choose the word whose stress pattern is different from that of the others:**

1. A. astonished - B. obstacle - **C. disposal** - D. apparent
(C. "disposal" has a different stress pattern)

2. A. advertise - B. history - **C. difficulty** - D. adventure
(C. "difficulty" has a different stress pattern)

3. A. calculator - B. language - **C. Beginning** - D. institute
(C. "Beginning" has a different stress pattern)

4. A. suitable - B. chemical - **C. comfortable** - D. direct
(C. "comfortable" has a different stress pattern)

5. A. open - B. observe - **C. direct** - D. consult
(C. "direct" has a different stress pattern)

Let me know if you need help with anything else!