单选题 This young lady was brave enough to prevent what ______ might have been a tragedy.
  • A. however
  • B. therefore
  • C. otherwise
  • D. only
【正确答案】 C
【答案解析】however：但是；therefore：因此，所以；otherwise：否则，在其他方面，不是这样的；only：仅仅，只有。