单选题 The thief might have left the money untouched for the simple reason ______ he didn't know it was there.
  • [A] why
  • [B] which
  • [C] that
  • [D] how


【正确答案】 C
【答案解析】[解析] 考查从句连接词。reason后可跟定语从句和同位语从句，区分的依据是看从句表达的是“为什么这样(做)”还是“原因是…”。前者是定语从句，一般用why引导，后者则是同位语从句，用that引导。由本题来看，he didn't know it was there就是reason(原因)本身，故是一个同位语从句，连接词用that。