この歌を聞く___、学生時代を思い出す。
Q. Which connective means 'every time (I hear it)'?
Translation
Every time I hear this song, I remember my school days.
Explanation
〜たびに means 'whenever/each time X happens': 聞くたびに. とたんに is 'the instant X happened' (one occasion, past), and うちに is 'while a state lasts'.