Нужно задать вопросы к выделенным словам:
1)Sampson SLEPT in the MAIN building on the FIRST floor.
2)We had CLEANED our PLATES by 7 P.M.
3)Raymond has a rider sphere of interest (Общий вопрос)
4)The house was built in the 19th century.

1 What did S do in the main building on the first floor?Which building did S sleep in? / Where did S sleep? On what floor did S sleep?2What had we done by 7 p.m.?What had we cleaned by 7 pm?By what time had we cleaned the plates?3Does R have a rider sphere of interest?4When was this house built?In what century was this house built?