单选题 We've asked three freight companies to give us quotes for the job and we'll take whichever one is the ______.
A. cheaper
B. cheapest
C. cheaply
D. cheap

【正确答案】 B
【答案解析】题空前有冠词the，因此必须填写cheap的最高级形式。选项(A)是比较级形式，选项(C)是副词，而选项(D)是形容词原形。