Choose the word whose underlied part is pronounced differently from the other three in the following questions

I. Choose the word whose underlied part is pronounced differently from the other three in the following questions.
1.     A. marry                 B. manage         C. damage          D. many
2.     A. exactly               B. exhaust          C. extinct            D.exist 
3.     A. thought              B. through         C. enough           D. weightlifting
4.     A. sentenced          B. laughed         C. stopped          D. surprised
5.     A. sword                 B. sweet             C. swear             D. swing