单选题 He was greatly vexed by the new and unexpected development.
A. astonished B. annoyed
C. enlightened D. contented

【正确答案】 B
【答案解析】[解析] 形容词辨析
vexed焦急的,为难的,恼怒的;A.astonished惊讶的;B.annoyed苦恼的;C.enlightened 文明的;D.contented满足的,心安的;因此B为答案。