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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
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在截至9月底的12个月中，就业成本上涨了2.8％，略低于截止上一季度末的一年。
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
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