Multiple choice softskills leadership He's been working in the field ___ early this morning. For After Since None of these Reveal answer Fill a bubble to check yourself C Correct answer Explanation 'Since' is correct because it marks the starting point (early this morning) of an action continuing to the present. 'He's been working' (present perfect continuous) requires 'since' + point in time. 'For' would need a duration like 'for 6 hours'.