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题库 / Prep2007E1-SC-31
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
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(D) to a two-year low level
By saying "low level," it doesn't tell us this is the lowest level in two years - just that it's low. It could have been just as low at some other point in the past two years, and that this is just one of those times. Since that's not specific enough for readers to understand quickly, it's not the best answer.
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