单选题 The scandal at the zoo was exposed by disgruntled staff on March 10 when they went on strike over unpaid wages. According to the staff, this was not the first time that the zoo has been mired in scandal.
【正确答案】 B
【答案解析】解析：句意：这则有关动物园的丑闻是3月10日动物园员工参加罢工抗议工资被拖欠时揭露出来的。据员工们说，这已不是该动物园第一次陷入这类丑闻了。disgruntled意为“不满的，不高兴的”，discontented“不满意的”与它意思接近，故选B。disgraceful“不名誉的”；on-strike“参与罢丁的”；off-post“下岗的”。