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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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D low不能修饰动词，只能修饰名词。如果D要正确，需要是 lower than the percentage (they did)
5个选项都没有percentage/that去指代2.8%，所以可以判断是动作比较。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。
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