1．A 当否定词语置于句首以表示强调时，句中的主谓需采用倒装结构。本题的正常语序是Parking is permitted in this area at no time.
2．D 当not until引导的时间状语或时间状语从句位于句首时，后面的主句要采用倒装结构，故首先排除选项A、B。选项C否定重复，错误。故应选答案D。改写为正常语序为：They did not know a girl had been killed in it until they moved into the apartment.
3．D 否定副词如no, not，never, seldom，little，hardly, rarely，nowhere等位于句首时，句子要部分倒装。选项C动词时态与题干中所提供的时态(过去时)不符，故应排除。
