单选题 Not until he came to China ______ any idea of what a panda is like.
  • A) does John know
  • B) John knows
  • C) did John know
  • D) should John know


【正确答案】 C
【答案解析】[解析] 词首为not...until引导的状语，句子要部分倒装，例如：Not until yesterday did I learn anything about it. (直到昨天我才对这件事有所了解。)A时态不对。