单选题 The boy has as much progress ______ we had expected.
  • A. as
  • B. that
  • C. which
  • D. what
【正确答案】 A
【答案解析】[解析] 该句为限制性定语从句，先行词progress在定语从句中充当动词expect的宾语，又因为受“as...as...”结构影响，故使用关系代词as引导。