单选题 I sent invitations to 90 people, ______ have replied.
  • A. of whom only 30 of them
  • B. of whom only 30
  • C. only 30 of those who
  • D. only 30 who


【正确答案】 B
【答案解析】名词/代词+of+关系代词(which/whom)常引导非限制性定语从句，of whom only 30=only 30 of whom。