According to some economists, the July decrease in unemployment so that it was the lowest in two years suggests that the gradual improvement in the job market is continuing.
so that it was the lowest in two years
so that it was the lowest two-year rate
to what would be the lowest in two years
to a two-year low level
to the lowest level in two years
这道题误解了比较级
以为两年是两个东西在比只能用-er的比较级,不能用-est最高级
然而两年内的level不限于两个东西,so……
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