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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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这次感觉比较难，句意要理解透才行。首先 B排除，it单复数不对。 slightly less/lower than 去年。如果是lower那么是接的一个number，2.8 percent；less 是指rose less. 带入原句，lower的用法都不对，AC之间选A
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