Noun + Preposition Dictation: Change and Opportunity

Notice what the preposition points to: an area that changed, a proposal being answered or people receiving an opportunity. In often identifies the area of an increase or improvement; to can link a response or approach to its subject. A chance to do something has an infinitive, while opportunity for can introduce people before their action. These are patterns heard here, rather than the only possible uses of those nouns. Keep the exact phrase and following clause, so the detail behind the change or opportunity remains clear.