101. Even though the direct costs of malpractice disputes amounts to a sum lower than one percent of the $541 billion the nation spent on health care last year, doctors say fear of lawsuits plays a major role in health-care inflation.
A amounts to a sum lower
B amounts to less
C amounted to less
D amounted to lower
E amounted to a lower sum
对于这一题还是很是很清楚。觉得对题目的结构和意思很模糊。我试着翻了一下，请大家指教：
去年，虽年关于玩忽职守这类争论的直接成本比国家花在健康保健上的＄541billion 少百分之一，但医生们表示，对于打官司的恐惧发挥着举足轻重的作用在健康保健的夸大问题上。
总觉得意思怪怪的，大家帮分析一下
还有一个问题，时态要保持一致，这里前半句过去时，后半句现在时。是不是并不是根据逗号、句号来判断是否一句话，上面的题目实际上是两句话，所以可以时态不同？
health-care inflation---医疗费用的增长
可以试着这样考虑
Even though从句主语是the direct costs，谓语要用复数，所以直接排除AB。
剩下CDE里比:
E、lower修饰sum，明显残疾。扔
C、D：后面有具体的数量，应该用less,所以选C
除非有明显的时间状语提示，不建议通过时态来比较选项。
Even though the direct costs of malpractice disputes amounts to a sum lower than one percent of the $541 billion the nation spent on health care last year, doctors say fear of lawsuits plays a major role in health-care inflation.
A amounts to a sum lower
B amounts to less
C amounted to less
D amounted to lower
E amounted to a lower sum
关于此题，我是这样理解的
amount “总计，达”已经包含了sum的意思，属于“意思重复”，排除A/E
less表示数量,数字的“多少”
lower表示价格等量词的“高低”
此题中是说少于one percent of the $541 billion这个数字 ，因此要用less，排除D
再就是时态了last year修饰前面整个句子，讲述的是过去的事情，过去时态的标志
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