1.(2012·山东省实验中学诊断)What was considered impolite years ago has become __________ now.
A.accessible
B.adjustable
C.unbelievable
D.acceptable
解析:选D。考查形容词辨析。accessible意为“易接近的,可理解的”;adjustable意为“可调整的”;unbelievable意为“难以相信的”;acceptable意为“可接受的”。句意为:多年前被认为不礼貌的事情现在已经开始逐渐被接受了。根据句意可知,应选D。