Choose the word whose underlined part is pronounced differently from that of the rest
1. A.whole. B.when. C.where. D.while
2. A.notice. B.socket. C.enroll. D.mobile
3. A.engineer. B.exercise. C.experiment. D.exhibition
4. A.comment. B.equipment. C.improvement. D.development
5. A.bean. B.teammate. C.speaker. D.overhead
