【正确答案】:
WHEN WE WALKED IN THE BACK DOOR WHICH HUNG OPEN, WE SAW PEOPLE STANDING IN THE KITCHEN.
【题目解析】:考点:walk in:走进;hung open:敞开着。see sb. doing:看到某人正在做某事。句子结构:when引导时间状语从句:当……的时候;前半句中which引导定语从句修饰the back door。
WHEN WE WALKED IN THE BACK DOOR WHICH HUNG OPEN, WE SAW PEOPLE STANDING IN THE KITCHEN.