I. Pick out the word whose underlined part is pronounced differently from that of the other words (6pts)
1. A. pancake ` B. surface C. situation D. tasty
2. A. delicious B. concern C. price D. parcel
3. A. business B. humid C. music D. community
4. A. poisonous B. pollution C. contaminate D. cholera
5. A. buzz B. pollutant C. earplug D. untreated
6. A. billboard B. visual C. fine D. contaminant