【题目】Learning from ________ mistakes can help us keep conscious and avoid repeating them in the days to come.
A. previous B. curious C. obvious D. ridiculous
在线课程【答案】A
【解析】
试题分析：句意：吸取以前的错误可以帮助我们保持清醒，避免在未来的日子重复这些错误。 A. previous以前；B. curious好奇；C. obvious明显；D. ridiculous荒谬。故选A。