【题目】Readers are required to _________ the rules of the library and mind their manners.
A. observe B. confirm
C. review D. appreciate
在线课程【答案】A
【解析】
试题分析：考查动词辨析 句意为：读者要遵守图书馆的规定，注意他们的言行举止。observe vt 观察，遵守；confirm vt 确认，确定，证实；review vt 回顾，检查；appreciate vt感激，欣赏。故答案应为A。