这题要我命了。。。看到后面over the last two years 觉得是题目给的时间提示，要用现在完成时 所以就选了E。。。。请问为啥这题最后完全不考虑时态了呢

1) each year和annually重复，排除A,B,C.
2)...companies could save money by doing sth v.s. in sth. 语义有别。在此需要表达的是通过预防疾病来省钱，用by. 而in的意思是在预防疾病上省钱，不准确。
3）此外，they指代是的companies,没毛病。

老师，未划线部分"all unfettered by governmental regulations"，视频讲解里说是定语，可是您之前不是讲过:用逗号隔开的分词短语就不能算作定语了嘛...

Negative:
If (B) is a "no", then the tick population is not artificially small as a result of a limited # of host animals. In that case, the plan is likely to have the described effect.
Those are fundamentally contrasting outcomes, depending on whether (B) is true or false, so that means (B) affects the judgment.

RonPurewal:
If (B) is a "yes", this means that the tick population is smaller than it could be, because there aren't enough host animals to go around. I.e., the tick population "wants" to get bigger, but simply can't, because there aren't enough host animals.
If that's the case, then introducing extra host animals won't spread the ticks out more thinly; it will just increase the total number of ticks! So the bacterium won't be affected.

怎么做？

注意c和E的区别，C说的是reform activity，E说的是presence at rally，明显文章说的是presence at rally。

请大神解答一下：A选项在时间前面加一个in对吗？
they were not nearly as high as in the early 1980s, when
前面33题省略了比较的对象直接加了时间状语
The infant mortality rate has decreased steadily over the past decades and is now lower than ever before.

两个介词不能放一起

A：Since "spend nearly six hours a week", like ""perform well", doesn't represent a fundamental change of state or indicate a difference along the timeframe, thus the combination of "had spent nearly six hours a week" and "by 1997" makes no sense here.

Like brown bears and polar bears (and unlike other myrmecophagous mammals, which are noted for their passivity), sloth bears are easily provoked to aggression.

文章下面又说sloth bear cub can not choose climber tree as defense from predation.

为什么不选E？

"amount" is a construction that can only be used to refer to UNCOUNTABLE quantities -- Ron

Premise：this insurance is partly responsible for the high rate of bank failures, since it removes from depositors any financial incentive to find out whether the bank that holds their money is secure against failure.
Conclusion：If depositors were more selective, then banks would need to be secure in order to compete for depositors' money.
补出Gap：E项弥补了前提到结论之间的gap，就是建立在depositors能够辨别出是否secure
排除他因：D项中排除了一个原因，就是其他导致银行破产的原因。但是题目很严谨，已经说是，这只是其中的部分原因，所以D项有违题干想考察的内容了。

题目错了，应该是[m]=1/2*m when m is even.

这题真是好难得的一个秒选题 55555555 激动了 让我哭一下