I/. Choose the word which has the underlined part pronounced different from the others.
1/. A. pool B. fool C. look D. too
2/. A. bull B. full C. pull D. skull
3/. A. tomb B. comb C. home D. dome
4/. A. stone B. phone C. zone D. none
5/. A. passage B. message C. voyage D. age