A: ______ did you come so late to your office this morning?
         B: Oh, I felt so sick that I couldn’t get up on time.

  • A How
  • B Which
  • C Why
  • D Who
参考答案: C
解题思路: “你今天早上为什么那么晚到办公室?”“哦,我感到很不舒服以至于不能准时起床。”由句意可知是询问原因,用why,故选C。