单选题 For a long while he waited, not daring to descend from his hiding place ______ they should come out and catch him in the act.
  • [A] when
  • [B] lest
  • [C] that
  • [D] where


【正确答案】 B
【答案解析】[解析] 题干前一分句中的时态是一般过去时，而后一分句谓语动词是should+动词原形，由此可以判断所填词应引导一个虚拟语气句，而四个选项中只有lest可以引导虚拟语气句，故[B]为答案。