Sure! Here are the answers for your exercises:

**Ex2: Choose the word whose underlined part is pronounced differently.**
1. C. safe (The others have a different vowel sound in their underlined parts.)
2. C. wicked (The others have the past tense -ed pronounced as /t/ or /d/, while "wicked" has a /ɪk/ sound.)
3. D. one (The others have a different vowel sound.)

**Ex3: Choose the word whose stress pattern is different from the others.**
1. C. photograph (The stress is on the second syllable, while the others are usually stressed on the first syllable.)
2. D. directory (The stress pattern differs from the others, which typically have the stress on the second syllable.)

If you have any more questions or need further assistance, feel free to ask!