This blue bike is too expensive. Could you show me a one?AcheapBcheaperCcheapest

问题补充：

This blue bike is too expensive. Could you show me a one?

Acheap

Bcheaper

Ccheapest

Dcheapper

答案：

A. cheap

(答案→)B. cheaper

C. cheapest

D. cheapper

解析：句意：这辆蓝色的自行车太贵了。请你给我展示一个更便宜的一个。分析句意两者进行的比较，现在展示的自行车，与将要展示的自行车进行比较。便宜的比较级直接加er，故选B