I had been a university student for three years, but not until this afternoon had I felt the thrill of______.
【正确答案】 D
【答案解析】解析：该句的意思是：当时我已经大学三年级了，但直到这天下午我才感到了一种满足感。confusion混乱，混淆；disappointment失望；sensation感觉，感情，感动；fulfillment履行，实行，满足。