I. Find the word which has a different sound in the part underlined. 1. A. algal B. aquatic C. contaminate D. permanent 2. A. thermal B. thankful C. there D. thorough 3. A. pollution B. earplug C. dump D. dust 4. A. untreated B. measure C. pleasure D. bread 5. A. physical B. visual C. music D. because II. Choose the word in each line that has different stress pattern. 1. A. scientific B. dramatic C. athletic D. domestic 2. A. national B. chemical C. medical D. informal 3. A. prehistoric B. economic C. linguistic D. optimistic 4. A. medical B. hospital C. politic D. electric 5. A. physical B. horrific C. beautiful D. different