Multiple choice

Directions: Fill in the blank with the most suitable preposition.

We need proof _____ his story.

  1. to

  2. by

  3. of

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The phrase 'proof of' is the correct preposition combination when we need evidence supporting something. We use 'of' to show what the proof relates to - here, proof that supports his story. 'To' would indicate direction, 'by' would indicate method, and neither fits grammatically.

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