单选题 This must be the reason ______ he didn't come to the contest.
  • A. in which
  • B. with which
  • C. that
  • D. for which
【正确答案】 D
【答案解析】[解析] 本题考查定语从句中介词+关系代词的语法点。 [解析] 题目中先行词为reason，而该词在从句中充当状语。此时应该用关系副词why或介词+which。此时介词的选择取决于能否与reason构成搭配，应选for。故答案为D。