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.