单选题
As______rule, oranges are sold by______weight and eggs by______ dozen.
[A] a;不慎;the [B] a; the; the [C] a; a; the [D] the;不慎;不慎
【正确答案】
A
【答案解析】[解析] as a rule意为“通常地”是固定词组；在度量名词前，表示付工资、卖、租等方式时，用the，如paid by the hour(day，month，piece…)，sold by the yard(dozen，ton…)，但by weight意为“按重量”。