单选题 This is the most interesting book ______ I have ever read.
  • A. which
  • B. that
  • C. what
  • D. as
【正确答案】 B
【答案解析】[解析] 该句为限制性定语从句，先行词book在定语从句中充当动词read的宾语，故使用关系代词引导，又因为先行词被最高级修饰，故只能使用that。