I. (Questions 11-15) Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. (1.25 pt)
11. A. teenager B. together C. guess D. regular
12. A. chicken B. coach C. chemistry D. change
13. A. physics B. useful C. disease D. rehearse
14. A. prevention B. suggestion C. invention D. collection
15. A. liked B. laughed C.practiced D. learned
