Answered really effectively at Are idioms not advisable in a formal problem? around on ELL. Be aware that idioms really are a subset (or arguably two subsets) of preset phrases. payment or reward (especially from a federal government) for acts for example catching criminals or killing predatory animals or https://bulkdrinkssupplier28406.birderswiki.com/1602293/5_tips_about_lumber_for_sale_online_you_can_use_today