Choose the word whose main stress pattern is different from that of the others

Choose the word whose main stress pattern is different from that of the others.
1. A. advice       B. beauty             C. picture              D. postcard
2. A. prevent     B. practice            C. pollute              D. provide
3. A. happy       B. polite                 C. careful             D. modern
4. A. energy      B. journalist           C. coputer            D. company 
5. A. economic  B. disappointed     C. intermediate     D. interesting
6. A. purpose    B. machine            C.surface              D. greenhouse