In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.
Americanseat______vegetablesperpersontodayastheydidin1910.
_______foryourlaziness,youcouldhavefinishedtheassignmentbynow.
Hecomplainedtothebooksellerthattherewereseveralpages______inthebook.