Mr.Johnson______rathernotinvestthatmoneyinthestockmarket.
In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.
Whilecrossingthemountainarea,allthemencarriedgunslestthey______bywildanimals.
Beingextremely_____tothecold，Idonotlikeskating.
名词解释：营养性缺铁性贫血
