单选题 ______the poem a second time, it will be much better under stood.
  • [A] Your having read
  • [B] Having read
  • [C] When you read
  • [D] While reading


【正确答案】 C
【答案解析】注意到主句的主语是让，所以不能选[B] Having read，主语必须是read的执行者。[D] While reading同理不能选。when引导的状语从句就没有这个问题，所以选C。