The ticketing clerk reminded the passengers of how ______ it is for them to arrive at the train station at least two hours before their schedules departure time. A. Important B. Importance C. Importantly D. Import 답이 a 입니다. 형용사 자리라고 하는데 of how___ it is 이사이에 무조건 형용사가 와야하나요? 휴 문법좀 알려주세요..