________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
Inthefuture,more______shouldbeplacedontheeducationoftheyoung.
EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.
Wemust______thattheexperimentiscontrolledasrigidlyaspossible.
GeneralMotors,oneoftheworld'slargestautomanufacturers,isexpandingits________inthiscountry.
Attendanceatfootballmatcheshave_____sincethecomingoftelevision.