Multiple choice

Directions: Fill in the blank with an appropriate verb, preposition, participle or conjunction. The question is followed by four alternatives. Choose the most appropriate one.

I saw him two months _________.

  1. ago

  2. before

  3. for

  4. since
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A Correct answer
Explanation

Case of past indefinite tense. whenever we refer to a specific time of the past, we use 'ago', and not 'back' or 'before'. 'For' and 'since' do not fit the requirement of the blank here.

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