{{B}}sECtion 3 quEstions 21-30{{/B}}
{{B}}quEstions 21-25{{/B}}
ComplEtE thE Following stAtEmEnts using {{B}}no morE、thAn thrEE、worDs{{/B}} For EACh gAp.
BEn usED ______ As A sourCE oF inFormAtion.