核心问题
It took me ____ days to finish drawing a beautiful horse. A. a half dozen B. half a dozen C. half dozens D. half dozen
《高中英语解题题典》(东北师大出版社，p.42)对上题作了如下解答：“答案为 B。‘半打’的表达方式一定要用‘half a dozen’。” 请问:能否说 a half dozen 呢?
词典解答
half a dozen 比较常用,但是 a half dozen 也是正确用法。请看下面的例证:
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These eggs are 40p a half dozen. (=40p for six) (LDCE) 这些鸡蛋四十便士半打。
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half a dozen/a half-dozen(ALD) 半打(六个)