Multiple choice

Directions: Fill in the blank with the appropriate form of the verb.

It must ______ to you that he was simply bluffing.

  1. have occurred

  2. occurred

  3. occur

  4. have occur
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 The use of 'must' necessitates use of first form of the verb or the third form in the present perfect tense 'must have occurred'. Here the first form cannot be used in view of the use of 'was bluffing' in the past tense. 

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