Giúp mình với các bạn ơi!!!IChoose the words whose underlined part is pronounced differently from that of the others in each group 1. A. astounding B. cavern C. citadel D. acceptance 2. A. tents B. keys C. beds D. days 3. A. enough B. tough C. laugh D. though 4. A. because B. nurse C. horse D. purpose 5. A. marriage B. dosage C. collage D. shortage 6. A. limestone B. pilgrim C. rickshaw D. citadel 7. A. geological B. imagine C. agency D. together 8. A. wonder B. complex C. backdrop D. proper 9. A. historic B. picturesque C. enter D. sentence 10. A. plumber B. sculpture C. measure D. structure 11. A. island B. pilgrim C. surprising D. shrine 12. A. sculpture B. structure C. future D. culture 13. A. complex B. citadel C. cavern D. contestant 14. A. pleasure B. measure C. treasure D. great 15. A. aging B. cavern C. cave D. ancient 16. A. cleaned B. caused C. decided D. studied 17A. hour B. history C. honor D. honest 18. A. bottles B. tables C. teachers D. lips 19. A. found B. sound C. source D. count 20. A. scream B. sneaky C. pleasant D. feature 21. A. style B. type C. classify D. sympathy 22. A. storage B. encourage C. shortage D. garage 23. A. classify B. geology C. psychology D. photography 24. A. amusing B. practising C. advertising D. arising 25. A. universe B. technical C. profession D. content 26. A. climate B. comic C. hike D. website 27. A. worked B. laughed C. hoped D. naked 28. A. cover B. category C. ancient D. decorate 29. A. erupt B. humor C. UFO D. communicate 30. A. chorus B. champion C. cheap D. child