It "seldom knocks twice"
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meaning, expansion, explanation, and origin of proverb Opportunity seldom 
knocks... [DOC] [TLE] Opportunity seldom knocks twice  Think in English [PAR] Find a translation for phrase "Opportunity seldom knocks twice" in other 
languages: - Select -,  (Chinese), Espaol (Spanish),  (Japanese)
... [DOC] [TLE] Even in Egypt, Opportunity Seldom Knocks Twice - Muftah [PAR] Jul 26, 2013 ...