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

Find the word which has a different sound in the part underlined
1. A. pastime          B. winter              C. ice       D. bike
2. A. sandwich        B. chair                C. school              D. chicken
3. A. gram                B. packet           C. many                     D. want
4. A. engineer         B. greeting         C. teethe           D. street
5. A. couches         B. boxes              C. houses         D. tables