Traffic is heavy and the price of oil is much so that many people go to work by bus inste

问题补充：

Traffic is heavy and the price of oil is much so that many people go to work by bus instead.

A. higher

B. high

C. more expensive

D. expensive

答案：

(答案→)A. higher

B. high

C. more expensive

D. expensive

解析：higher更高的；high高的；more expensive更贵的；expensive贵的．句意：交通很拥挤，油价更高，因此许多人反而乘公交车上班．英语中长用high和low来表示价格的高低,结合语境可知前文表示的是和交通状况的对比,故用形容词的比较级做定语,选Ａ．