when/while引导的时间状语从句 — 英语填空题
题目
用 when 或 while 填空，每空一词：（1）The magician was showing his trick ___ the lights suddenly went out.（2）___ we were watching the magic show, something strange happened.（3）The rabbit appeared ___ the magician opened the box.（4）I was taking photos ___ my friend was clapping for the magician.