第33题:[不定项选择题]She felt frustrated on the train because__________. A.her train was delayed for four hours B.she didn't have a pen with her C.her mind suddenly went blank D.no one would offer her help 参考答案:B 根据文章第四段“To my immense frustration('沮丧),I didn’t have a functioning pen withme.”可知,答案选B。