_____thishashappenedonoccasion,thisistheexceptionanddefinitelynottherule.
Whatisagenerallyacknowledgedasthemostpowerfuladvertisingmediumandreachesabroadspectrumofconsumers.（）
Arecompaniesprovidingtheseservicestolookgoodtothecommunityorbecausetheyarefinanciallysuccessful?