Choose the words which have the underlined part pronounced differently

EX 1. Choose the words which have the underlined part pronounced differently.
1. a. order          b. story                  c . come         d. morning
2. a. first             b fish                     c live              d. king
3. a. away           b. skate                 c. say             d. far
4. a. think           b. then                    c. this            d. that
5. a. sister          b. island                 c. answer       d. biscuit
    Hộ e với ạ