group couple double trouble19/50Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questionsgroupcouple double trouble Giải thíchĐáp án A group /gru:p/: nhóm couple /'kʌpl/: cặp đôi double /'dʌbl/: gấp đôi trouble /'trʌbl/: rắc rối