### Exercise 1: Different Sound in Underlined Part

1. The word with a different sound is **D. climb**. The underlined 'b' is silent, whereas the 'b' in the other options has a pronounced sound.

2. The word with a different sound is **A. practice**. The 'p' is pronounced as /pr/, while in the other words, 'p' is followed by a vowel sound and pronounced similarly.

3. The word with a different sound is **A. express**. The 'e' is pronounced as /ɛ/, whereas in the other words (precious, present, celebrate), the underlined 'e' has a more rounded /ɪ/ or /eɪ/ sound.

4. The word with a different sound is **C. each**. The 'ea' in 'each' is pronounced /iː/ while in the other words (greet, weave, head) the 'ea' is pronounced differently.

5. The word with a different sound is **A. simple**. The 'i' is pronounced as /ɪ/, while in the other words (practice, tribal, bridge), the 'i' appears to have more of an /aɪ/ sound.

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### Exercise 2: Different Stress from Others

1. The word with different stress is **D. avoid**. All others (famous, common, staple) are stressed on the first syllable, while 'avoid' is stressed on the second syllable.

2. The word with different stress is **B. disagree**. The first syllable of 'disagree' is weaker than the others (occasion, tradition, expensive), which are stressed on the second syllable.

3. The word with different stress is **D. freedom**. It has primary stress on the first syllable, while the others (harmful, maintain, lifestyle) have stress on the second.

4. The word with different stress is **B. hurry**. It is a monosyllabic word with stress on a single syllable, while the others (healthy, online, modern) are all multisyllabic with stress on the first syllable.

5. The word with different stress is **B. habit**. It is stressed on the first syllable, while the others (improve, native, famous) are stressed on the second syllable.