_______ difficult questions they are! I can’t answer them.

  • A How
  • B How an
  • C What
  • D What an
参考答案: C
解题思路: 考察“What+(形容词)+可数名词复数或不可数名词+主语+谓语!”的感叹句句型,questions为可数名词复数,故选C。