单选题 The clerk had been {{U}}insolent{{/U}} to his superior once too often; now he was without a job.
【正确答案】 B
【答案解析】[分析] 形容词辨析 insolent傲慢的,无礼的;D.affectionate亲爱的,挚爱的;B.rude粗鲁的,无礼的,残暴的;C.dishonest不诚实的;D.sly狡猾的;因此B为答案。