Choose the word whose underlined part is pronounced differently from the other three in each question

* Choose the word whose underlined part is pronounced differently from the other three in each question.
11. A. thirsty                   B. them                   C. both                      D. thick
12. A. weather                B. then                     C. think                     D. brother
13. A. schedule               B. when                   C. red                        D. comedy
14. A. slow                      B. phone                 C. count                    D. post
15. A. game                   B. relax                    C. national                D.channel