单选题 Only when (he realized) that there (would be) more (difficulties) ahead than he expected (he came to) me for help.
  • A. he realized
  • B. would be
  • C. difficulties
  • D. he came to


【正确答案】 D
【答案解析】改为did he come to。因为only(when)置于句首，句子要倒装。