💡 Detailed Explanation
The correct choice is 'はず' (forming 'はずです' - should be / expected to). The grammar pattern '[Verb Plain Form] + はずだ' expresses a strong logical conviction based on reliable evidence ('さっき駅を出た' - he left the station a moment ago). Sentence translation: 'Since Mr. Kimura left the station a moment ago, he should arrive here very soon.' 'つもり' (intention), 'こと' (matter), and 'よう' (looks like) do not convey this logical certainty.