单选题 ______, the crops would have died.
  • A. If it didn't rain
  • B. Had it not rained
  • C. If it doesn't rain
  • D. Should it rain
【正确答案】 B
【答案解析】[解析] 此题测试虚拟语气的用法。这个句子要求用虚拟语气过去时。A)过去时；C)真实条件句现在时；D)将来时。只有B)表示与过去事实相反的假设，是答案。由于省略了if，had与it倒装。