A wearer knows where ---.

A wearer knows where ---. Correct Answer the shoe pinches

She is one of the delegates 'who was chosen' to attend the convention Who indicates delegates. Delegates is a plural word. So verb will be 'were'.

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The wearer best knows where the shoe pinches.
Complete the proverb 'A wearer knows where .
Complete the proverb 'A wearer knows where .