单选题 I didn't understand at first why he couldn't pass the test, no matter______hard he had tried.
  • A) when
  • B) where
  • C) what
  • D) how


【正确答案】 D
【答案解析】[答案精解] 句意：起初我不明白为什么无论他怎么努力都考不及格。该题考查的是状语从句。how修饰副词hard, no matter how 引导让步状语从句。