单选题 Shy felt frustrated when nobody understood what she was trying to say.
  • A. boring
  • B. upset
  • C. angry
  • D. dull


【正确答案】 B
【答案解析】frustrated和upset意思相同，表示“失心烦意乱的、闷闷不乐的”；boring：令人厌烦的；angry：生气的、恼怒的；dull：没有意思的、乏味的。