题目

题型：不详难度：来源：

As _______rule, apples are sold by _____weight and eggs by ________dozen.

A．a; 不填；the

B．a; the; the

C．a; a; the

D．the; 不填；不填

答案

A

解析

as a rule(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, moth, piece…), sold by the yard (dozen, ton…)，比较by weight (按重量)。