a two-year low level would be a low level that lasted for two years. that's not the intended meaning in the problem.

july decrease是一个名词，错误的原因在于没有分析清楚句子的主干。

C would错，已经是既定的事实
D 是一个持续性的水平 长期的
E 是个时间点 短暂的低水平

这题错简直是属于自己闲的没事想多了！！！！

X so that Y
表示Y是X的purpose，so that句型含有一定的主观态度，用在这道题上不合适

①A/B选项还有一个问题就是it的指代，it是指代unemployment还是decrease。
②so that只适合用来描述adj.
（第一次选对了 第二次选错了）

to a two-year low level = 长达两年的低水平
前置定语是永久属性
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……

前置定语是永久属性！two -year low level是说这个level2年一直这么low

the principal objection here is that the meaning is incorrect/unclear: for instance, a 'two-year low level' could mean that it hit a low level and then stayed there for two years.

RON：the principal objection here is that the meaning is incorrect/unclear: for instance, a 'two-year low level' could mean that it hit a low level and then stayed there for two years.
consider other uses of the adjective "two-year":
a two-year lease is a lease that LASTS for two years.
a two-year recession is a recession that LASTS for two years.
a two-year marriage ... etc. etc.

选项A so that可以修饰动作,但不能修饰名词 ；排除AB
选项C would可表将来,而原句是已经知道的一个事实, would使用错误
选项D two-year low level不符合习惯用法,意思表达不清
选项E 正确 the July decrease in unemployment to the lowest level in two years suggests that the gradual improvement in the job market is continuing.

by analogy, we can see that this answer choice has (or at least primarily suggests) the incorrect meaning: a two-year low level would be a low level that lasted for two years. that's not the intended meaning in the problem.

RON：the principal objection here is that the meaning is incorrect/unclear: for instance, a 'two-year low level' could mean that it hit a low level and then stayed there for two years.
consider other uses of the adjective "two-year":
a two-year lease is a lease that LASTS for two years.
a two-year recession is a recession that LASTS for two years.
a two-year marriage ... etc. etc.

Choice C improperly uses would be to describe a situation that is presented as a current and known fact. Also, there is no noun for lowest to modify

C："what" is one of those words that should be evaluated on a case-by-case basis. generally, you shouldn't use it unless there are no other options. (the good thing here, of course, is that these questions are multiple-choice -- so you'll be able to tell whether there are "other options" or not!)

D选项错在哪里呢？