单选题 Failure to provide ______ explanations for his frequent blunders, this young man was fired.
【正确答案】 A
【答案解析】该句意为:他经常出错,却找不到合理的解释,结果被炒鱿鱼了。rational:合理的,理性的;sentimental:伤感的,情绪化的,多愁善感的;eccentric:性格古怪的;skeptical:怀疑的。