1.When I......arrived ......(arrive)at this house,he still......was sleeping......(sleep)
2.The light......went......(go)out while we......were having............(have)dinner
3.Bill.......was having ........(have) breakfast when I.....stopped......(stop) at this house this morning.
4.As we were........crossing...(cross)the street,we....saw...(see)an accident
5.Tom.....saw.....(see)a serious while he.....was standing..(stand)at the bus stop
6.While my father..was reading....(read)a newpaper,I......was learning.....(learn)my lesson and my sister.....was doing....(do)her home work
7.The children..were playing........(play) football when their mother......came....(come)back home
8.The bell.......rang....(ring)white Tom...was taking........(take)a bath
9.I..was...(be)very tired because I.......had worked.....(work)all day yesterday
10.He.....was sitting......(sit)in a cafe when I.....saw.(see)him