D 时态啊时态！！！

(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.

用unlike A,B排除CDE；在某一天”具有竞争关系的公司可能会在下一天变成合作伙伴所以compete和one day需要连贯的，断开变成as competing就和前面句子断了关系了，排除B

代词it的指代对象只能是名词而不能是一个句子或动词。但是在逻辑上，第一个英国的居住者做的事情应该是establish a permanent colony这件事，因此只能用did so而不能用did it。

warm-blooded mammal's than a cold-blooded reptile's后面已经有了‘s所以已经形成后面的metabolism就不用再加those of 了，排除C

unlike A,B,所以排除ABC；D的主语是the rate，后面一定要跟具体的比例，不能用half表达

may and possible重复所以排除ABC；D中melting and that are rising不平行，就好像writing a book and a written book一样，所以排除D

没有in an attempt at的用法只有to的用法，排除ACE；B中说scientist was attempting to...科学家可以主动attempt而不用was所以排除

香烟不能主动用纸，排除CE；B中in which they use中的they前面没有可指代的对象，只有a ci..排除B；D中的and thereby slowing前面应该有一个并列的ing形式但是没有，所以排除D。

这题为什么不选E？男神快来啊！！！！！！！！！

A和D相比，D更strong！因为D是一定会decline profit的，A只说单价会增加，但没确定数量，单价*数量的变化未明

类比推理，找不同

题目第一句话就是competivity的定义：rising living standard 和 balanced trade 哎……

consume这里是指摄入，而不是消耗。。

not-but 平行

错选了A，A的范围给的是BC 1700年啊！但题干范围是1650-1500...粗心粗心

as they approach mature!!! from the context

Clearly price promotions are generally run at a loss, otherwise there would be more of them.
开展价格促销活动是有成本的，否则公司会开展更多价格促销活动。
题目问的是：价格促销活动，会对“bottom line 有影响” 的依据是什么。

这是一个果因题，看哪个选项能加强上文的结论。D确保了中风一定会损害一个半球，所以实验前提就被确认了