All those second-hand goods are sold at before．
A. 30％ as lower price as
B. 30％ as low a price as
C. as 30％ low price as
D. 30％ lower price than
网友回答
A. 30％ as lower price as
(答案→)B. 30％ as low a price as
C. as 30％ low price as
D. 30％ lower price than
解析：考查倍数的表达：倍数+as +adj+as结构，这里30%就相当于倍数，句意：这些二手商品比之前的要便宜百分之三十。这30％ as low a price as 是固定搭配，不能调换词的顺序的。