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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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你把句子内容都补齐，than前后应该完全平行，这个句子应该是：
costs rose 2.8 percent in X, less than costs rose in Y.
这里后面的costs rose和前面完全一致，所以可以改写成
costs rose 2.8 percent in X, less than they did in Y.
costs rose 2.8 percent in X, less than costs rose in Y.
这个句子里后一个costs rose可以省略吗？就变成costs rose 2.8 percent in x less than in y. 就变成D选项了，为什么不对？
lower不能用来修饰可数名词
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