单选题 There is no doubt ______ the couple did the right thing in coming back home earlier than planned.
  • A. whether
  • B. that
  • C. why
  • D. when


【正确答案】 B
【答案解析】[考点] 考查存在句结构。
there is no doubt后常跟that引导的从句，表示“毋庸置疑的是…”。that引导的从句实质上是该存在句式中真正的主语成分。因此本题选B。