Question

【题目】Which of the following words can NOT be added the prefix "un-" to give it the opposite meaning?

A. happyB. healthyC. usualD. polite

Answer 1

【答案】D

【解析】

句意：下面哪一个单词不能加前缀un变成反义词？happy开心的，幸福的；unhappy是不开心的；healthy健康的，unhealthy是不健康的；usual平常的，unusual不同寻常的；polite有礼貌的，反义词应该是impolite，应加前缀im-，故D符合题意。