知识点
比较必须是逻辑上平行。也就是说，必须比较同一类的事情。
◆ Frank’s build, LIKE his brother, is broad and muscular.

上面的例句中用Frank’s build 和 his brother 进行比较，这在逻辑意义上不平行。所以正确的应该是：

◆ Frank’s build, LIKE his brother’s, is broad and muscular. 或者：

◆ Frank, LIKE his brother, has a broad and muscular build.

上面的例子中我们可以使用that 来代替build ，而如果是复数的话就要用those 来替换：

◆ Frank’s toes, LIKE THOSE of his brother, are short and hairy.

比较也需要结构上平行，也就是说相似的语法结构：

◆ I like to run through forests more than I enjoy walking through crowds.

上面的例子中run through forests 和walking through crowds 两个比较对象并不平行。To run 作为不定式，而walking 则是作为一个名词来使用，所以正确的可以写成：

◆ I like running through forests MORE THAN walking through crowds.

试题
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.

A. 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
B. Heating-oil prices are expected to rise higher this year over last because refiners pay about $5 a barrel for crude oil more than they did
C. Expectations are for heating-oil prices to be higher this year than last year's because refiners are paying about $5 a barrel for crude oil more than they did
D. It is the expectation that heating-oil prices will be higher for this year over last because refiners are paying about $5 a barrel more for crude oil now than what they were
E. It is expected that heating-oil prices will rise higher this year than last year's because refiners pay about $5 a barrel for crude oil more than they did
试题
正确答案：A
参考解释:
A 正确，比较对象平行
B 比较级固定搭配用higher than,不用over; more的位置不能随意改变,应该紧跟barral
C this year 和last year's 不平行；did 和 are 不对等；more的位置不能随意改变，应该紧跟barral；Expectations are for heating-oil prices 不够简洁
D It is the expectation that 啰嗦，能够用动词表达的不要用名词； 比较级固定搭配用higher than,不用over; now错误的修饰了oil； what多余，此处比较的是两个动作，不是名词性短语；第一个for多余
E It is expected that 啰嗦；this year 和last year's 不平行；more的位置不能随意改变,应该紧跟barral

看完句子，发现than 存在this year 和 last year 付钱问题，所以发现they 后面的动词要用be动词，与are paying 平行。所以BCE 错了。
接着看D than后面有个what they were what 多余了，前面是refiners
所以A