扫描二维码，直接登录
题库 / Prep2007E1-SC-24
Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter.
less than they did
less than it did
less than they were
lower than
lower than they were
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
比较结构要先确定比较对象，本题比较对象是状语，但是此处主语不能省略，易有歧义
1) 比较结构中,如果省略后会对省略结构造成歧义,则不能省略
2) 替代原则: 前面出现过的动词,后面只能用do和did代替,或者重复前面出现过的动词.以本题举
例: 前面出现的rose在比较结构后半句中可以用did替代,或者重复rose
(D) lower只能做形容词,不能修饰动词rose; than in the year比较结构表达太模糊,完全可以理解为
than others expected in the year或 than price rose in the year等等，所以补足主谓可以消除歧义
lower只能做形容词,不能修饰动词rose
Higher and lower we use for physical entities
“did”对应“rose” 不能省略
The meaning should be clear: The costs rose by 2.8% this past year; in the previous year, they rose by more than 2.8%. So, this year, they rose less than they did last year.
"Lower" and "greater" can't be used to compare actions.不能用于动作的比较
lower只能做形容词,不能修饰动词rose;
high/low 不能修饰动作，只能修饰名词。more/less才可以修饰动作，也可以修饰名词。
如果要用lower 需要是 lower than the percentage （they did），而选项中没有percentage或that的指代，可以判断是动作的比较而不是名词的比较。
in general, i can only think of three types of nouns for which you can use "lower" as a quantifier:
1）mathematical quantities (things that can be represented by actual numbers)
2） abstract ideas that aren't necessarily numbers, but that can be thought of as somewhat quantitative
3） things that are literally (= physically) lower than other things
in general, i can only think of three types of nouns for which you can use "lower" as a quantifier:
1）mathematical quantities (things that can be represented by actual numbers)
2） abstract ideas that aren't necessarily numbers, but that can be thought of as somewhat quantitative
3） things that are literally (= physically) lower than other things
than others expected in the year或 than price rose in the year等等，所以补足主谓可以消除歧义
比较对象：Employment costs rose 2.8 percent 复数主语+动词
所以后面肯定是they did 直接排除BCDE。
另外lower 是形容词不能修饰动词。
costs复数主谓一致，杀B
费用是多少，不是高低，杀DE
平行，杀C
lower —— a figure is lower than ...
如果主句前面是用系表结构，是否可以用lower？
--> 代名詞為複數，且動詞為 did