Find the word which has different sound in the underlined part in each line

I: Find the word which has different sound in the underlined part in each line.
1.A. prefer B. Better C. Teacher D.worker
2. A. bear B. hear C. dear D. near
3. A. mother B. some C. cold D. come
4. A.absent B. government C. dependent D. enjoy
5. A. future B. return C. picture D. culture