Choose the word whose underlined part is pronounced differently

Choose the word whose underlined part is pronounced differently
1.A.close.    B.do        C.go.        D.window
2. A.washes.       B.watches.     C.brushes.    D.goes

3 A.floor        B.book.        C.look.       D.neighbhood
4.desk.        B.students.     C.lamps.        D.pens