Find the word which has a different sound in the part underlined

. Find the word which has a different sound in the part underlined
11. A. prefer B. desert C. held D. celebrate 
12. A. walked B. crowded C. needed D. excited
13. A. delicious B. comic C. concert D. scout
14. A. arrived B. helped C. returned D. remembered
15. A. looked B. cleaned C. received D. arrived
16. A. humor B. honest C. hotel D. hurry
17. A. kitchen B. catch C. chemistry D. armchair
18. A. see B. shelf C. show D. sugar
19. A. different B. parent C. pretty D. cafeteria
20. A. gently B. get C. gather D. regular