单选题 Small children can not ______ the difference between right and wrong. It is our duty to teach them.
A. appreciate B. enjoy C. acknowledge D. confess

【正确答案】 A

【答案解析】[解析] A项“appreciate鉴别，正确评价”符合题意，如：A musician can appreciate small differences in sounds．(音乐家能辨别声音中极细微的差别。)其他三项“B项enloy享受，喜爱；C项acknowledge承认，答谢，报偿；D项confess承认，坦白，忏悔”都不正确。本题空格处是说鉴别对与错的不同之处。因此A项为正确答案。