________fromtheoccasionallatenightparty,ourneighborsareveryquiet.
A、Apart________somanypeopleintheUnitedStatesbeenoutofworkastoday.
Wemust______thattheexperimentiscontrolledasrigidlyaspossible.
Tostudyaforeignlanguage,__________.
Sixtypercentoftelevisionviewerschosehimastheir_______actor.
EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.
