单选题 As the price of oil keeps ______, people have to pay more for driving a ear.
【正确答案】 B
【答案解析】[解析] 本题考查keep的固定用法。keep doing sth.为固定词组，意为“一直做某事”。本题中keep going up表示油价持续上涨，故正确答案为选项B。