Choose the word in each group has the underlined, italic part pronouced differently from the rest.
1/ A. course B. trouser C. house D. account
2/ A. keen B. kite C . keep D . knife
3/ A. asked B. helped C. prayed D. dressed
4/ A. many B.make C.shape D. grade
5/ A. word B.sword C.world D.burn