Multiple choice

Directions: Supply the correct form of the verb given in bracket.

It was clear that he (work) very hard.

  1. have worked

  2. are working

  3. am working

  4. had worked
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D Correct answer
Explanation

The sentence structure 'It was clear that' indicates we need a past tense form. 'Had worked' (past perfect) shows he worked very hard before that past moment of observation. The other options are all present tense forms: 'have worked', 'are working', 'am working' - none fit with the past observation context established by 'was clear'.

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