As we all know, apples are sold by weight, and socks are sold by dozen.
A. the; a
B. /; a
C. /; the
D. the; the
网友回答
A. the; a
B. /; a
(答案→)C. /; the
D. the; the
解析：句意：正如我们所知道，苹果按重量卖，袜子按打卖。这里按重量，重量前不用冠词，如果是重量下的某个单位，那么就在名词前加上the，第二空dozen是具体的数量单位，所以前面用定冠词。故选C。