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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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If you wanted to use "lower than" correctly, you would need a noun in the second part of the comparison (e.g. "2.8% is lower than the percent for last quarter).
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