Heating-oil prices are expected to be higher this year than last because refiners are paying about $5 a barrel more for crude oil than they were last year 划线部分即正确答案 我的问题是:than 前后的对比对象是什么?OG说是去年和今年的heating-oil prices 但是than后面用的是last啊。。表时间啊。。是不是省略了heating-oil prices?