Answer:
S1: Wrote--->float, Teacher---> Bleacher
S2: Answer--->Dancer, Demand--->Expand
S3: Knew--->Blew, Study---> Muddy
S4: Problem--->Drum, Not--->Bot
S5: Dough---> Though, Tomorow---> Sorrow
S6: Special---> Vessel, Grand---> Stand
S7: Share--->Shore, Square---> Glare
S8: Quake---> Ache, Boots---> Fruits