From each number, pich out one word whose underlined part is pronounced differently from the other

I) From each number, pich out one word whose underlined part is pronounced differently from the other (phải giải thích vì sao lại chọn từ đó,không giải thích được thì không có điểm)

1) a-perform                           b-colour                      c-boring                      d-your

2) a-bath                                 b-watch                       c-want                         d-water

3) a-thank                               b-think                        c-father                       d-them

4) a-happen                             b-house                       c-hour                         d-horse

5) a-filled                                b-destroyed                 c-wished                     d-prepared

6) a-flow                                 b-crowd                       c-cloud                                    d-scout
GIÚP MK VỚI MN ƠI!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!